Purpose – The purpose of this paper is to examine the effects of gravity variables and trade costs on China's export margins. Design/methodology/approach – Following the structural gravity model with firm heterogeneity, the paper measures the extensive margins and intensive margins of...

This note provides a simple exposition of what IV can and cannot estimate in a model with binary treatment variable and heterogenous treatment effects. It shows how linear IV is essentially a misspecification of functional form and the reason why linear IV estimates will generally depend on the...

Summary Empirical work on the wage impact of training has noted that unobserved heterogeneity of training participants should play a role. The expected return to training, which partly depends on unobservable characteristics, is likely to be a crucial criterion in the decision to take part in...

Abstract The E-value is defined as the minimum strength of association on the risk ratio scale that an unmeasured confounder would have to have with both the exposure and the outcome, conditional on the measured covariates, to explain away the observed exposure-outcome association. We have...

Abstract This paper studies the connections among the asymmetric Laplace probability density (ALPD), maximum likelihood, maximum entropy and quantile regression. We show that the maximum likelihood problem is equivalent to the solution of a maximum entropy problem where we impose moment...

Abstract We interpret an ecological inference model as a treatment effects model in which the outcomes of interest and the conditional covariates come from separate datasets. In this setting, the counterfactual distributions and policy parameters of interest are only partially identified under a...

Purpose The purpose of this paper is to investigate the impact of internet usage on financial performance of small farm business households in the USA. In particular, the authors want to assess the impact of internet usage on small farm businesses, where the owner’s main occupation is farming....

There are a number of international conventions and national legislations in response to child labor. However, children are being vulnerable to different work related risks. The risks and impacts of child labor can be determined by the age of child, the type and hours of work performed and the...

Abstract Child labor-free product labels are efficiency-enhancing when child welfare is a public good only if resources are generated to enhance the well-being of children. However, for a small price-taking economy with at least as many goods as factors and competitively supplied labels, the...

Abstract This paper analyzes the problem of child labor in an infinite-horizon dynamic model with a variable rate of time preference and credit constraints. The variability in the rate of time preference leads to the possibility of multiple steady states and a poverty trap. The paper considers...