The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.

The Policy Research Working Paper Series disseminates the findings of work in progress to encourage the exchange of ideas about development issues. An objective of the series is to get the findings out quickly, even if the presentations are less than fully polished. The papers carry the names of the authors and should be cited accordingly. The findings, interpretations, and conclusions expressed in this paper are entirely those of the authors. They do not necessarily represent the views of the International Bank for Reconstruction and Development/World Bank and its affiliated organizations, or those of the Executive Directors of the World Bank or the governments they represent.

Motivated by increasing religious intolerance, we study the socio-economic covariates of individual-level religious intolerance in Indonesia, the largest Muslim democracy in the world. We use panel data from 2007 and 2014 of more than 20,000 adult individuals (representing 83% of the population) and apply fixed-effect regression analysis to identify relevant socio-economic characteristics that are highly associated with religious intolerance at the individual level. We utilize survey questions on willingness to accept someone with different faith living in the same village, living in the same neighborhood, renting a house, marrying relatives or children, and building a place of worship in the neighborhood as our measures of religious intolerance. We find that higher individual income and educational attainment are positively correlated with the tolerance level. At the same time, a higher level of self-declared religiosity is negatively correlated with a tolerant attitude. For location-specific characteristics, higher income inequality and extent of poverty in the location where an individual resides are associated with a higher level of religious intolerance. These patterns are generally robust across different measures of religious intolerance, although there is heterogeneity in the magnitudes of the correlations, where these covariates have the smallest correlations with the willingness to accept interfaith marriage in the family.

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Very few studies explicitly, let alone quantitatively, examine gaps in religious intolerance among individual Muslims based on a liation with major Muslim organizations in Indonesia. Most existing studies either focus on a single organization (non-comparative), are at the organizational policy level (not examining individual attitudes), or use a limited number of samples in their analysis. Against this backdrop, this study compares Indonesian Muslims' levels of religious intolerance based on their a liation with Muslim organizations or traditions: Nahdlatul Ulama (NU), Muhammadiyah, and other organizations. We utilize a large-scale household survey, the 2014 Indonesia Family Life Survey-5, and run an ordinal logistic regression to identify organizations' rank on the religious intolerance scale. We find that Muslims without any a liation with a Muslim organization (some 18 percent of Indonesian Muslims) are the most tolerant. Against this reference group, we find that NU followers are generally the most tolerant, followed by those a liated with Muhammadiyah, and those a liated with other Muslim organizations. This finding adds a stock of knowledge to our understanding of religion and society, especially regarding interfaith relations in Indonesia and in the Muslim world in general. Methodologically, this study also shows the benefit and feasibility of identifying the dynamic of religious intolerance using a quantitative approach at a micro level.