In medieval times, most people identifi ed with religious values and aggregate income and productivity grew at glacier speed. In the 20th century, religion played a much lesser role in daily life and income and productivity grew at high and unprecedented rates. The present paper develops a...

From 1997 to 2005, an astonishing 5,200 million USD was invested to reduce cocaine production in Colombia, the world's main cocaine producer. However, little is known about the effectiveness of policies targeting coca cultivation. This paper uses a surveybased experiment to evaluate the effects...

Approximately 1.2% of Colombia's GNP is spent every year on the war on drugs, but very little is known about coca farming decisions at the household level. In order to understand the decision to cultivate coca as well as that of the amount of land to use for its cultivation, we develop an...

Charitable giving is one of the major obligations Islam and a strong Muslim norm endorses giving to the needy, but discourages public displays of giving. This norm is puzzling in light of previous evidence, suggesting that making donations public often increases giving. We use an experiment to...

The intense debate on the effectiveness of the war on drugs contrasts with the lack of empirical evidence on its impacts. To evaluate the effectiveness of control-supply policies, we use micro data from an original survey with farmers living in a coca growing area in Colombia. We find that while...

A collective decision problem is described by a set of agents, a profile of single-peaked preferences over the real line and a number k of public facilities to be located. We consider public facilities that do not suffer from congestion and are non-excludable. We provide a characterization of...

This paper presents the results from an experiment investigating whether framing affects the elicitation and predictive power of preferences for cooperation, i.e., the willingness to cooperate with others. Cooperation preferences are elicited in three treatments using the method of Fischbacher,...

We examine a global refunding scheme for mitigating climate change. Countries pay an initial fee into a global fund that is invested in long-run assets. In each period, part of the fund is distributed among the participating countries in relation to the emission reductions they have achieved in...

We analyze non-cooperative international climate policy in a setting of political competition by national interest groups. In the first stage, countries decide whether to set up an international emission permits market, which only forms if it is supported by all countries. In the second stage,...

This paper examines the investment incentives of market-based regulation, with focus on the technology characteristics the different regulatory schemes tend to incentivize. The firms' technology choice is socially optimal if and only if the aggregate emission allowance supply is completely...