• "Combining Non-Cointegration Tests [PDF]" (with Christian Bayer)  STATA and MATLAB [RAR] code implementing the procedures"Nonstationary-Volatility Robust Panel Unit Root Tests and the Great Moderation [PDF]"
• "Variable Selection via Multiple Testing with an Application to Growth Econometrics [PDF]" (with Thomas Deckers)
• "Unit Root Testing in Heteroskedastic Panels using the Cauchy Estimator" (with Matei Demetrescu)
• "Multiple Testing for Output Convergence [PDF]" (with Thomas Deckers)
• "On the asymptotic distribution of a unit root test against ESTAR alternatives [PDF]"
• "A Simple Nonstationary-Volatility Robust Panel Unit Root Test [PDF]" (with Matei Demetrescu)
• "Robust IV Estimators for Autoregressive Processes under Nonstationary Error Volatility" (with Matei Demetrescu)