Working papers

Abstract We study choice among lotteries in which the decision maker chooses from a small library of decision rules. At each menu, the applied rule must make the realized choice a strict improvement under a dominance benchmark on perceived lotteries. We characterize the maximal Herfindahl-Hirschman concentration of rule shares over all locally admissible assignments, and diagnostics that distinguish rules that unify behavior across many menus from rules that mainly act as substitutes. We provide a MIQP formulation, a scalable heuristic, and a finite-sample permutation test of excess concentration relative to a menu-independent random-choice benchmark. Applied to the CPC18 dataset (N= 686 subjects, each making 500-700 repeated binary lottery choices), the mean rule concentration is 0.545, and 64.1% of subjects show excess rule concentration, rejecting menu-independent random choice at the 1% level. Concentration gains are primarily driven by modal-payoff focusing, salience-thinking, and regret-based comparisons.
Keywords Behavioral economics, Decision Theory, Revealed Preference
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Abstract We develop a new model of faith-based organizations (FBOs) as multi-sided platforms. Faithbased platforms (FBPs) offer two types of services. The first is a religious service that includes providing a moral narrative, giving guidance and counselling, and proposing access to the divine through prayer, meditation or rituals. The second is a networking service that allows members to connect with members who come for the religious service. By offeringboth types of service, FBPs benefit from the spill-over effect of the religious service, whichhelps to screen for trustworthy network members. FBPs are more profitable than organizations that only offer areligious service, often even per capita, and are generally larger in size. The optimal community size depends on the type of interactions the FBP fosters and how much it invests in the quality of the religious service. This can explain the diversity of FBOs that continue to thrive despite secular competition and some recent phenomena that cannot be fully explained by existing models of FBOs, such as the growth of religion in some urban settings and the emergence of religious communities that have grown very large without sacrificing high profits per member.
Keywords Religion, Faith-based organisations, Platforms
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