One of the core goals of a universal health care system is to eliminate discrimination on the basis of socioeconomic status.  We test for discrimination using patient waiting times for non-emergency treatment in public hospitals.  Waiting time should reflect patients' clinical need with...

We study the role of the propensity scores in estimating treatment effects for the treated with a multi-valued treatment.  Assume assignment to one of the multiple treatments is random given observed characteristics.  Valid causal comparisons for the subpopulation who has been treated a...

Many estimation methods of truncated and censored regression models such as the maximum likelihood and symmetrically censored least squares (SCLS) are sensitive to outliers and data contamination as we document. Therefore, we propose a semipara- metric general trimmed estimator (GTE) of...

Abstract: This paper considers spatial autoregressive (SAR) binary choice models in the context of panel data with fixed effects, where the latent dependent variables are spatially correlated. Without imposing any parametric structure of the error terms, this paper proposes a smoothed spatial...

This paper identifies the effect of neighborhood peer groups on childhood skill acquisitions using observational data.  We incorporate spatial peer interaction, defined as a child's nearest geographical neighbors, into a prodiction function of child cognitive development in Andhra Pradesh,...

India's development experience over the past fifty years suggests that the increasing importance of the services sector deserves analysis.  The literature on structural change has emphasised changing patterns of demand as an explanation for the increasing importance of the services sector.  In...

Regular use of effective health-products such as insecticide-treated mosquito nets (ITN) by a household benefits its neighbors by (a) reducing chances of infection and (b) raising awareness about product-effectiveness, thereby increasing product-use.  Due to their potential social benefits and...

We extend the three-step generalized methods of moments (GMM) approach of Kapoor et al. (2007), which corrects for spatially correlated errors in static panel data models, by introducing a spatial lag and a one-period lag of the dependent variable as additional explanatory variables. Combining...

I use a randomised conditional cash transfer program from Indonesia to provide evidence on peer effects in consumption of poor households.  I combine this with consumption visibility data from Indonesia to examine whether peer effects in consumption differ by a good's visibility.  In line with...

A major attraction of panel data is the ability to estimate dynamic models on an individual level. Moffitt (1993) and Collado (1998) have argued that such models can also be identified from repeated cross-section data. In this paper we reconsider this issue. We review the identification...