In this paper we study identification and estimation of a correlated random coefficients (CRC) panel data model. The …

We propose a portmanteau test for serial correlation of the error term in a fixed effects model. The test is derived as …

We extend range-based volatility estimation to the multivariate case. In particular, we propose a range …

almost all these papers ignore the bias in the estimated standard errors that serial correlation introduce4s. This is … especially troubling because the independent variable of interest in DD estimation (e.g., the passage of law) is itself very … biased: with about 20 years of data, DD estimation finds an 'effect' significant at the 5% level of up to 45% of the placebo …

We develop estimation methods that use the amount of selection on the observables in a model as a guide to the amount …