Intersectoral collaboration for people-centred mental health care in Timor-Leste: a mixed-methods study using qualitative and social network analysis

Background Intersectoral collaboration is fundamental to the provision of people-centred mental health care, yet there is a dearth of research about how this strategy operates within mental health systems in low- and middle-income countries. This is problematic given the known attitudinal, structural and resource barriers to intersectoral collaboration in high-income country mental health systems. This study was conducted to investigate intersectoral collaboration for people-centred mental health care in Timor-Leste, a South-East Asian country in the process of strengthening its mental health system. Methods This study employed a mixed-methods convergent design. Qualitative data elicited from in-depth interviews with 85 key stakeholders and document review were complemented with quantitative social network analysis to assess understandings of, the strength and structure of intersectoral collaboration in the Timorese mental health system. Results There was consensus among stakeholder groups that intersectoral collaboration for mental health is important in Timor-Leste. Despite resource restrictions discussed by participants, interview data and social network analysis revealed evidence of information and resource sharing among organisations working within the health and social (disability and violence support) sectors in Timor-Leste (network density = 0.55 and 0.30 for information and resource sharing, respectively). Contrary to the assumption that mental health services and system strengthening are led by the Ministry of Health, the mixed-methods data sources identified a split in stewardship for mental health between subnetworks in the health and social sectors (network degree centralisation = 0.28 and 0.47 for information and resource sharing, respectively). Conclusions Overall, the findings suggest that there may be opportunities for intersectoral collaborations in mental health systems in LMICs which do not exist in settings with more formalised mental health systems such as HICs. Holistic understandings of health and wellbeing, and a commitment to working together in the face of resource restrictions suggest that intersectoral collaboration can be employed to achieve people-centred mental health care in Timor-Leste.


Background
People-centred approaches to mental health care are increasingly promoted in low-and middle-income countries (LMICs) through global mental health policy, practice and research directives [1,2]. The World Health Organisation defines people-centred health care as: "an approach to care that consciously adopts the perspectives of individuals, families and communities, and sees them as participants as well as beneficiaries of trusted health systems that respond to their needs and preferences in humane and holistic ways. " [3]. Peoplecentred health care is proposed to apply to people with all types of health conditions.
Intersectoral collaboration is one of the key strategies for achieving people-centred health care in the World Health Organisation Framework on Integrated People-Centred Health Services (WHO IPCHS) [3]. There is no definitional consensus on intersectoral collaboration. In line with recent conceptual developments in global health, we adopt a broad definition of intersectoral collaboration for mental health as: any planning, information and resource sharing to institute mental health care between organisations from different sectors (i.e. public, private, not-for-profit) and/or across thematic areas (i.e. health, social services) [4,5]. This definition encompasses collaborations for mental health service referrals and back referrals, as well as for the purposes of mental health system governance, including the involvement of mental health service user and family organisations.
Emerging from the 1978 Declaration of Alma Ata [6], and subsequent action to embed Health in All Policies (HiAP) [7,8], intersectoral collaboration underpins current global movements to achieve health equity and sustainable development [9]. Intersectoral collaboration is fundamental to the provision of people-centred mental health care because many of the sociocultural and economic determinants of mental health and wellbeing lie outside the health sector [10][11][12]. Furthermore, in many LMICs, people rely on customary (traditional, religious or faith-based) or private mental health providers, particularly in the absence of well-developed public health infrastructure [13][14][15].
Intersectoral collaboration for mental health has been shown to be effective. A systematic review of research from high-income countries (HICs) revealed that collaboration between mental health and non-clinical services improves clinical recovery and other outcomes for mental health service users (e.g. employment, housing stability), as well as system outcomes (e.g. service and cost efficiency) [16]. Such collaborations included service co-location, joint interorganizational training and use of a shared information system between services [16].
However, intersectoral collaboration is difficult to achieve. Collaboration is often challenged by systemic factors (e.g. inadequate resourcing, lack of shared interorganisational structures, goals, and trust) and interpersonal factors (e.g. poor communication) [5,[17][18][19][20]. In many LMICs, partnerships are challenged because Ministries of Health are hierarchically structured and seen as solely responsible for health activities [19]. Hence, there may be feasibility issues for promoting intersectoral collaboration for mental health in LMICs.
Despite the global imperative to increase the peoplecentredness of mental health care in all countries [2,3], there is a dearth of research investigating intersectoral collaboration for mental health care across the multitude of sociocultural and resource settings that constitute the grouping LMICs. To fill this knowledge gap, this study was conducted in Timor-Leste, a LMIC in South-East Asia in the process of strengthening its public mental health system.

Study setting: Timor-Leste
Timor-Leste is a small island nation of 1.3 million people [21]. Promoting mental wellbeing is a government priority in Timor-Leste due to a range of sociocultural and economic risk factors for distress including poverty, unemployment, and past and continuing experiences of violence [22,23]. Rigorous estimates of the population prevalence of mental illness are limited and inconsistent. The only household survey of mental illness in Timor-Leste was conducted in 2004 with 1544 adults in the aftermath of the conflict, and estimated an adjusted 5.08% population prevalence of mental disorders [24]. However, this estimate is now 15 years old and likely does not represent the burden of mental illness in present day, more stable Timor-Leste. As well, their validity is weakened by the predominantly urban sample and the use of assessment tools that may have missed culturally meaningful idioms of mental distress. The 2016 Global Burden of Disease study estimates a 11.6% prevalence of mental and substance use problems [25].
Multiple stakeholders are involved in mental health care in Timor-Leste. Family and civil society including customary healers are the main form of support for Timorese people with mental health problems [26,27]. Within government, responsibility for mental health is split between the Ministry of Health (MoH) and the Ministry of Social Solidarity and Inclusion (MSSI). MoH coordinates the integration of a basic package of mental health care into primary health care, and the training and deployment of the mental health workforce [28]. Community-based mental health care is mainly provided by mental health nurses, and there is one psychiatrist and one psychologist working in the National Hospital. MSSI coordinates the 2012 National Disability Policy [29], and the social protection program and disability pension, which some people with psychosocial disability resulting from mental illness receive. Ministries of Education and Justice are involved peripherally with the institution of education and legal systems that some people with mental illness have contact with. NGOs provide a psychosocial rehabilitation service (Pradet), long-term stay service (Klibur Domin) and inpatient psychiatric service (São João de Deus, Laclubar). Social and violence support NGO services including for victims of family violence and legal assistance are also accessed by some people with mental health problems. International development organisations provide financial and in-kind support to MoH, MSSI and NGO service providers through health, and disability-and gender-inclusive development activities [30].
Intersectoral collaboration is a key strategy of the yetto-be implemented Timor-Leste National Mental Health Strategy 2018-2022, which aims to provide "comprehensive culturally-appropriate community-based mental health and social services" [22]. To achieve this, the National Strategy specifies collaborations between mental health, general health, maternal and child health and social support services.
However, it is not known how prevailing collaboration is structured and operates between the different stakeholders involved in mental health care in Timor-Leste. This is important to understand given the limited human and financial resources for mental health in Timor-Leste, which have been identified as barriers to collaboration in other settings. Specifically, there are only three mental health professionals per 100,000 people, and less than 0.29% of the 2018 government budget was allocated to the Public Health Directorate (including mental health) [31].
Hence, this study aimed to investigate intersectoral collaboration for people-centred mental health care in Timor-Leste's mental health system. The study aimed to answer the following research questions: 1. To what extent is intersectoral collaboration for mental health outlined in existing government, NGO, civil society and international agency documents in Timor-Leste? 2. What are the perspectives and experiences of multiple stakeholders about intersectoral collaboration for mental health? 3. What is the strength and structure of intersectoral collaboration in the national mental health system?
This research builds upon previous research by the authors that informed the Timor-Leste National Mental Health Strategy [27], and was conducted to inform the implementation of this Strategy.

Study sites
Dili, the capital of Timor-Leste, was selected as a research site to understand intersectoral collaboration across national government ministries, the national hospital, NGOs (including Pradet and Klibur Domin), and international organisations. Baucau municipality in Eastern Timor-Leste, and its administrative post, Venilale, provided a comparison of collaborative processes at sub-national levels. Baucau municipality is host to the country's second largest city where there are sub-national government ministry offices, a municipality referral hospital providing mental health care, and mental health and social support NGO service providers [32]. Venilale is a mountainous rural township which has an administration office and a government health clinic providing outreach mental health care to the surrounding villages. Laclubar administrative post in Manatuto municipality was also included as a data collection site because it hosts the São João de Deus inpatient mental health facility.

Design
This research employed a mixed-methods convergent design to investigate intersectoral collaboration for people-centred mental health care in Timor-Leste using qualitative data derived from in-depth interviews and document review, and quantitative social network analysis. The social network analysis findings enhanced understandings derived from document review and interview data to provide a holistic and rigorous picture of intersectoral collaboration that would not have been possible using only the qualitative data [33]. This article reports findings from the third component of a larger study investigating people-centred mental health care in Timor-Leste [34].

Document review
A review of electronic documents was conducted to provide information about the policy context, plans and implementation of intersectoral collaboration for mental health care in Timor-Leste (research question 1). Documents reviewed were produced between 2002 and 2019 by government, NGO, civil society and international organisations, including strategic plans, policies, legislation, and reports (n = 33). Key documents were sourced by conducting internet or reference list searches between September 2017 and March 2019 or were provided by participants during data collection. Information emerging from the document review was interrogated further during interviews, and compared against interview data during analysis.

Semi-structured interviews
In-depth semi-structured interviews were conducted to ascertain the experiences and opinions of multiple stakeholders about intersectoral collaboration for mental health (research question 2). Interviews were conducted with 85 adults (≥ 18 years) who were: (1) mental health service users (n = 20) and their families (n = 10); (2) government decision makers (n = 10); (3) mental health and social service providers (n = 23); (4) civil society (n = 9); and (5) other groups including international development organisations involved in mental health or social policy or service delivery (n = 13, see Table 1). Mental health service users were defined as adults aged 18 years or older who had used health or social support services related to their mental health and were able to provide informed consent and respond to interview questions. In the absence of a Timorese culturally-validated psychiatric diagnostic tool, the definition of mental illness was intentionally kept broad to capture the range of people who were considered to use services for mental illness. Mental health service users and their families were recruited through the administrative post health staff in Venilale and NGO service providers in Dili. Participants in groups 2 to 5 were recruited purposively by First Author TH based on their positions in government, NGO, international development and civil society organisations and institutions. In the first instance, participants were identified through a document review and the existing research collaborations that supported the development of the National Mental Health Strategy. Snowball sampling was used to identify and recruit subsequent participants who were mentioned in interviews and not already identified. Data were collected from September 2017 to August 2018. Interviews were semi-structured using an interview guide tailored to participant type. The interview guide was structured around the five strategies of the WHO Framework on Integrated People-Centred Health Services (2016): engage service users; strengthen governance; re-orient the model of care; forge intersectoral collaboration; and foster an enabling environment. This article reports findings pertaining to intersectoral collaboration. The interview guide contained open-ended questions and quantitative measures of collaboration. Open-ended interview questions enquired about the We adopt WHO's definition of civil society as individuals and organisations working for "collective action around shared interests, purposes and values, generally distinct from government and commercial for-profit actors" [65]. Civil society includes community groups, social movements and advocacy groups. Civil society also includes local chiefs and customary healers who may not be mobilised in formal groups. Other community members and organisations include representatives from international development agencies, law enforcement, universities, and other people with relevant knowledge but who do not work specifically in mental health in Timor-Leste experiences, structures and processes of mental health service delivery and policy making (see Interview guides in Additional file 1). Quantitative measures are outlined below in "Descriptive social network analysis". The interview guides were translated, their meaning checked, and piloted before data collection commenced. Author TH conducted all interviews directly in English, or with a trained interpreter in Tetum or Portuguese (national languages) or several Baucau local languages (Makassai and Cairui). Interviews lasted on average 47 min (range 7 to 111 min), and were in private places, including workplaces, health facilities or community houses. Framework analysis, an inductive and deductive qualitative data analysis method [35], was used to analyse interview data in NVivo version 12 [36]. Author TH conducted the framework analysis and an independent researcher validated coding. Author TH employed a combination of emergent themes and a priori codes (e.g. enabling factors, barriers). This article reports three main themes and 15 sub-themes relevant to intersectoral collaboration. Preliminary results were presented back to participants and interested parties in communities in Dili and Venilale to verify the authors' interpretation of the data.

Descriptive social network analysis
Intersectoral collaboration, as well as being difficult to achieve, is difficult to measure with traditional methods. Intersectoral collaboration can be considered a type of networked relationship [17]. Social network analysis (SNA), a complex systems discipline and quantitative methodology, is widely used in HICs to measure health policy networks [37][38][39][40]. SNA has more recently been applied in LMICs [41][42][43][44][45] in line with calls to adopt systems thinking to understand health system governance in these contexts [19]. For example, Hagaman et al. demonstrated the utility of SNA for understanding surveillance systems for suicide in Nepal [45]. Prior to our study, SNA had not been used to investigate both mental health service and system governance networks in a LMIC.
We used SNA to measure the strength and structure of connections between organisations operating at the national level of the mental health system in Timor-Leste (research question 3). SNA complemented the understanding about intersectoral collaboration garnered through qualitative data by examining the role of each organisation in the mental health network, as well as properties of the overall network [46].
SNA methods are summarised in Table 2. For SNA, the network was defined as 27 organisations from government, NGO, civil society and other organisations working in national mental health and social care (participant categories 2 to 5). Organisations were identified through previous research informing the National Mental Health Strategy 2018-2022 [27] and the document review. There were insufficient numbers of mental health organisations at sub-national levels to conduct SNA. As stated above, stakeholders were recruited using purposive and snowball sampling methods because SNA seeks to understand collaborative patterns between specific stakeholders and randomisation is unlikely to incorporate all central stakeholders [47].
SNA questions were embedded in interviews with one participant from each national organisation with knowledge of operations (i.e. manager level). These participants were presented with a list of organisations and asked about connections between their organisation and these listed organisations. These participants also nominated any missing organisations that they worked with. This 'recall list' is a validated technique for prompting participants to accurately report connections [48]. Two widely-used quantitative SNA indicators were collected. Participants rated the frequency of contact/ information sharing (e.g. meetings, phone calls, emails) and the frequency of resource sharing (e.g. funding, building space, transport, printing, materials) between their organisation and others over the preceding year on a six-point scale (none, yearly, quarterly, monthly, weekly, daily). Resource sharing is assumed to indicate a stronger degree of relationship than information sharing [5]. If there was overlap in categories (e.g. car sharing to transport patients involved both contact and resource sharing), participants rated contact and resource sharing separately.
Descriptive quantitative analysis of the two SNA indicators was conducted using UCINET software [49]. SNA data resulted in one matrix for demand and a second matrix for supply of information/resource sharing [50]. The rows in each matrix corresponded to the 27 organisations and were inputted with the frequency rating for information/resource sharing such that 0 indicated no relationship and 1-5 indicated an ascending order of connection. For each indicator, a network dataset was produced by combining these demand and supply matrices into a single matrix [48]. UCINET mapped each network and generated network-level and organisation-level metrics [49] (see Table 3 for a definition of each metric). Data cleaning was conducted in Microsoft Excel. Missing values for three organisations who were not interviewed were replaced with connection ratings reported by organisations who did respond [51].

Ethics
Verbal or written consent (depending on participant preference and literacy) was provided before interviews commenced and were audio recorded. Participants responding to SNA questions provided separate consent to include their organisation. Participant quotations and organisations in SNA were de-identified to fulfill the governing ethics agreements.

Results
The results section presents a synthesis of qualitative findings from the document review and interviews, and separately reports social network analysis findings. The mixed-methods findings are integrated in "Discussion". Table 4 presents the framework analysis themes and sub-themes for intersectoral collaboration from interviews and documents (research questions 1 and 2). See Additional file 2 for a summary table of extant government strategy, policy and legal documents related to mental health and psychosocial disability in Timor-Leste (research question 1).

Interviews and documents: perspectives and experiences about and documented approaches to intersectoral collaboration Enabling factors for intersectoral collaboration
The importance of intersectoral collaboration for mental health was a prominent theme across participant interviews and documents. Intersectoral collaboration between ministries, public institutions, development partners, civil society and communities was a key strategy in the National Mental Health Strategy of Timor-Leste  Similarly, a MSSI representative described complementary roles for MoH and MSSI in mental health, such that MSSI provided food and MoH provided medication for families affected by mental ill-health: "because [people with mental illness] need to eat in order to take medication" (Decision maker #9, 46-50 years, male).

Barriers to intersectoral collaboration
Despite the emphasis on intersectoral collaboration, mental health had limited specific mention in key health, social sector and development strategies (e.g. National Health Sector Strategic Plan 2011-2030, and Strategic Development Plan 2011-2030) [53,54]

Intersectoral collaboration for policy making and planning
Participants and documents reported many links between health and other sectors in Timor-Leste. Decision makers and documents reported that there were national-and municipality-level ministerial working groups for health and disability programming between MoH, MSSI and Ministry of Education. Government and NGO service providers said they attended quarterly disability or social sector working group meetings at the national and municipality levels. One decision maker from Baucau explained:  There is no mental health service user or family organisation in Timor-Leste so participants did not report contact with service users and families as a key part of their collaborations with other organisations. Figure 1 displays the key stakeholders for mental health and social service delivery across multiple levels of the mental health system based on information reported in interviews and documents. Participants reported that families affected by mental health problems directly accessed support from customary healers, government health services, Pradet or private health clinics. Police, local authorities, private clinics, social sector providers and customary healers referred people with mental health problems to government health facilities and Pradet. Referrals were made to and from government health services and Pradet, and São João de Deus inpatient mental health facility if the person was deemed to be very unwell. Government health services and Pradet also referred to, and received referrals from, MSSI and disability, violence or women's support organisations. Klibur Domin, a disability NGO, provided a longer stay service for people with mental illness coming to/from: family, São João de Deus mental health facility, prison or from living in homelessness. This quotation from a service provider exemplifies the information provided by participants:

Intersectoral collaboration for service delivery
We have a network with other organisations, they are our partners. These organisations are all over

Descriptive social network analysis: the strength and structure of national-level intersectoral collaboration Network metrics
Network metrics are provided in Table 5. The contact network had greater connectivity than the resource network, as indicated by higher density and average degree scores. Approximately 50% of organisations reported directly sharing information compared to 30% who directly shared resources (density = 0.55 and 0.30 for contact and resource sharing, respectively).
More organisations had direct contact for information sharing than resource sharing (average distance

Organisation metrics
Metrics were calculated to identify the relative importance of organisations in terms of their number of direct connections (in-degree centrality) and indirect connections (betweenness). Organisations with more direct or indirect relationships are assumed to have more opportunities to access relevant information or resources [42]. One NGO service provider (NGO1) and three government organisations (GOV1, MIN1 and MIN2) had the most direct and indirect connections for information sharing, and direct connections for resource sharing. International development organisations and civil society stakeholders (OT1, DP5 and CS1) had the most indirect relationships for resource sharing.

Discussion
This study is the first to investigate intersectoral collaboration for both mental health service provision and mental health system governance in a LMIC using mixed-qualitative methods and social network analysis (SNA). The key findings were:  1. Consensus among stakeholder groups that intersectoral collaboration for mental health is important in Timor-Leste; 2. Information and resource sharing exist among organisations (e.g. government, NGO, civil society, international development) working within the health and social (disability and violence support) sectors, despite resource restrictions discussed by participants; and 3. SNA proved useful for identifying subnetworks of intersectoral organisations to substantiate data from interviews and documents such that there was a split in stewardship for mental health between subnetworks in the health and social sectors.
The functional intersectoral connections within the Timor-Leste mental health system contrast with the challenges of health governance reported in other LMICs (e.g. weak government institutions, hierarchical structure of MoH) [19]. Intersectoral collaboration for mental health in Timor-Leste may be facilitated for several reasons. First, the appreciation of the interconnections between mental health and other sectors displayed by Timorese participants reflected the holistic understandings of health found in Timor-Leste [55] and indigenous peoples around the world [56,57]. Second, connections across the mental health system may have been enabled because they were primarily forged to share information, which is assumed in social network science to indicate a less intensive type of collaboration than resource sharing [5]. However, given that health knowledge is often among the most valuable of resources in LMICs [58], this finding could also suggest a stronger degree of collaboration. Third, connections between organisations may be forged out of necessity given the low availability of human and financial resources for mental health in Timor-Leste. Fourth, the relatively small number of organisations working in mental health and social services in Timor-Leste (n = 27) created a bounded community of practice, which contrasted with the fragmentation of mental health and social service systems reported to challenge collaboration in HICs [16]. The tightly-defined network combined with the reliance on informal and kinship networks for health previously reported in Timor-Leste [59] may overcome barriers to trust reported in settings with more formalised systems of mental health governance [17,18]. This is also in line with broader governance literature which reports that collaborations are most effective when they have clearly defined and agreed upon understandings of which problems they will address [60]. Hence, it will be important to consider how to maintain these connections as the Timorese mental health system expands and formalises; a key concern for mental health system strengthening in other LMICs.
Despite these information and resource sharing collaborations, the document review highlighted that mental health had limited specific mention in other key government policies. The commitment to intersectoral collaboration expressed by our participants may not be shared by other stakeholders who are not currently engaged with the mental health system. Thus, the disadvantage of not integrating mental health into intersectoral policies is that resources and political will cannot be mobilized to translate intention into practice [8]. Timor-Leste could benefit from explicitly incorporating mental health into intersectoral policies in line with efforts throughout the Asia and Pacific region to place 'Health in All Policies' (HiAP) [8,61]. Increasing awareness and understanding of the importance of mental health among intersectoral stakeholders may be part of achieving this. Given the overlap in scope, people-centred mental health care as a concept would benefit from more explicitly aligning with existing global health movements for universal health coverage and HiAP to relish the learnings and progress already made in these areas over the past 40 years. The shared stewardship for mental health in Timor-Leste is contrary to the assumption that the health sector is the primary steward for the people-centred health care model. This split stewardship is beneficial in Timor-Leste because it allows for more efficient use of existing resources and also opens up funding channels for mental health service providers through disability-and genderinclusive development that are not available through traditional health financing [30]. The central role of the social sector in the mental health system may promote people-centredness because social sector activities tackled the social exclusion of people with mental health problems and their families in Timor-Leste found in previous research (e.g. experiences of stigma, exclusion from employment and education) [62], which are also key barriers to mental health care access [63]. This governance structure acknowledges the social determinants of mental health and the co-existing health and social issues affecting families, which are typically under-addressed when there is a myopic focus on treating the mental illness. On the other hand, as one participant explained, government focus on mental health may be diluted without one central champion [19]. Furthermore, if more resources flow into mental health in Timor-Leste, requiring a greater level of coordination than information sharing, parallel systems of care may emerge over time. Hence, a key consideration is how to ensure that there are no gaps in implementation of strategies to achieve people-centred mental health care in Timor-Leste and other LMICs in which mental health stewardship is shared. This finding also highlights that global mental health efforts should not presume that that Ministry of Health is always the primary steward of mental health.
The prevailing collaborative structures for mental health service delivery and governance in Timor-Leste have important implications for the implementation of Timor-Leste National Mental Health Strategy 2018-2022. Currently, the key role of the social sector in mental health governance is underestimated. Decisions need to be made as to whether the split stewardship for mental health continues or if MoH steps up to lead mental health initiatives in line with their mandate established in the National Strategy. The service delivery collaborations highlighted the importance of social sector NGO service providers (e.g. psychosocial rehabilitation, violence support services), which suggests that training and capacity building that is currently focused on government mental health service providers should also incorporate these NGO providers. Finally, the absence of a mental health service user and family organisation is a key consideration for people-centred mental health care in Timor-Leste because without such a mechanism, the involvement of mental health service users and families in future intersectoral collaborations will likely remain minimal [64].
Our study had several limitations. SNA data may not have accurately captured the dynamic nature of relationships between organisations because it was cross sectional; assumed that information and resource sharing indicated relationship quality; and relied on participants accurately reporting connections with other organisations. However, we are confident that SNA accurately measured and mapped collaboration because SNA findings triangulated with data from interviews and documents. Our study is also limited because we did not incorporate the role of the customary sector, who we know from previous research by the authors plays a large role in the provision of mental health care in Timor-Leste and have emergent collaboration with the formal mental health sector [27]. Future research could use SNA to examine collaborations between the formal mental health and customary sectors over time. Research could also investigate the informal processes that drive intersectoral collaboration in Timor-Leste (e.g. trust) so that these can be harnessed to develop the mental health system.

Conclusion
Overall, the findings suggest that there may be opportunities for intersectoral collaborations in mental health systems in LMICs. These may not exist in settings with more formalised mental health systems such as HICs in which systemic (e.g. service fragmentation) and interpersonal factors (e.g. poor communication) are barriers to working collaboratively. The holistic understanding of health and wellbeing, and the commitment to working together in the face of resource restrictions suggest that