We investigate the issue of testing for structural breaks in large cointegrated panels with common and idiosyncratic regressors. We prove a panel Functional Central Limit Theorem. We show that the estimated coefficients of the common regressors have a mixed normal distribution, whilst the...

We examine theoretically and empirically social interactions in labor markets and how policy prescriptions can change dramatically when there are social interactions present. Spillover effects increase labor supply and conformity effects make labor supply perfectly inelastic at a reference group...

This study measures the effect of disability insurance on labor supply and health insurance coverage. The effect is identified by a policy in 1990 that increased the generosity of Social Security’s disabled-widow program. Using data from the Current Population Survey, the results suggest that,...

Our research examines individual differences in the effects of medical malpractice tort reforms on pre-trial settlement speed and settlement amounts by age and most likely settlement size. Findings of note include that, unlike previously assumed, both absolute and percentage losses from tort...

In 1993 I wrote "Communication and information management consume as much as 40 percent of all inpatient costs, yet errors still occur at an unacceptable rate. The Institute of medicine has suggested that electronic medical records (EMRs) will help lower health care costs, maintain quality of...

Fall 2001 (Revised from March 2001). Abstract: Our research provides new econometric evidence concerning partial economic risk sharing between a frail elderly parent and an adult child. We estimate a jointly determined limited dependent variables system explaining the parent’s entry into a...

October 2005 (Revised from March 2003/February 2004). Our research examines the effect of interdependence on estimation and interpretation of earnings/labor supply equations. We consider the cases of (1) a positive spillover from others’ labor supplied and (2) a need for conformity with...

September 2002 (Revised October 2002). Executive Summary: The current debate over cost-benefit concerns in agencies’ evaluations of government regulations is not so much whether to consider costs and benefits at all but rather what belongs in the estimated costs and benefits. Overlaid is the...

March 2003 (Revised from January 2003). We examine the incidence, form, and research consequences of measurement error in measure of fatal injury risk in U.S. workplaces using both BLS and NIOSH data. We find evidence of substantial measurement errors in the fatality risk researchers attach to...

March 2001 (Revised from May 2000). During the 1980s and 1990s there were great increases of health insurance coverage for poor children through the Children’s Health Insurance Program (CHIP) and extended Medicaid eligibility. Problems remain for the small number of children with serious...