We identify necessary and sufficient conditions under which a finite data set of price vectors and consumption bundles can be rationalized by a weakly separable utility function.  Our result could be understood as a generalization of Afriat's Theorem.

This paper analyses characteristics and determinants of the recent explosion of patent filings by Chinese firms both in China and the United States.  We construct a firm-level dataset by matching USPTO and SIPO patents to Chinese manufacturing census data for the period 1999-2006.  Using this...

In many developing countries, the beneficiaries of transfer programmes are determined by community-based processes, based on some general targeting rules related to needs.  This opens the door for local social and political processes to impact on who gets access.  Despite increasingly large...

This paper studies the interaction of incentive pay and social distance in the dissemination of information.  We analyse theoretically as well as empirically the effect of incentive pay when agents have pro-social objectives, but also preferences over dealing with one social group relative to...

We consider forecasting with factors, variables and both, modeling in-sample using Autometrics so all principal components and variables can be included jointly, while tackling multiple breaks by impulse-indicator saturation.  A forecast-error taxonomy for factor models highlights the impacts...

Optimal climate policy should act in a precautionary fashion to deal with tipping points that occur at some future random moment. The optimal carbon tax should include an additional component on top of the conventional present discounted value of marginal global warming damages. This component...

Following the 2007 disputed Kenyan Presidential election unprecedented levels of violence erupted across the country adding to the history of troubled elections in Africa.  This paper offers quantitative and qualitative evidence on the incidence, impacts and issues that triggered electoral...

This paper provides a causal reason for failure in productive efficiency in the household and explains why some households may be less efficient than others.  In the theoretical model, spouses make labour allocation decisions in each period to generate income, facing a threat of divorce in the...

The diffusion of an innovation can be represented by a process in which agents choose perturbed best responses to what their neighbors are currently doing.  Diffusion is said to be fast if the expected waiting time until the innovation spreads widely is bounded above independently of the size...

An influential thesis [Kuran, 2011, The Long Divergence] locates the economic failure of the Middle East in Islamic legal arrangements that laid the basis for organizational deficiencies.  This article critically scrutinizes this thesis using the lens of political economy and argues that...