References

• 1983Limited-dependent and qualitative variables in econometrics13,257 cited
• 1984Econometric Models for Count Data with an Application to the Patents-R & D Relationship3,391 cited
• 1992Protection For Sale3,302 cited
• 1995National Borders Matter: Canada-U.S. Regional Trade Patterns.2,002 cited
• 1989The Generalized Gravity Equation, Monopolistic Competition, and the Factor-Proportions Theory in International Trade1,799 cited
• 1995Development, Geography, and Economic Theory1,093 cited
• 1995How Wide is the Border?1,059 cited
• 1993Trade Liberalization and the Theory of Endogenous Protection: An Econometric Study of U.S. Import Policy759 cited
• 2000Is Protection for Sale? Evidence on the Grossman-Helpman Theory of Endogenous Protection513 cited
• 1987Limited Dependent Variable Models Using Panel Data454 cited
• 2000To Pool or Not to Pool: Homogeneous Versus Heterogeneous Estimators Applied to Cigarette Demand333 cited
• 1997Trade Barriers and Trade Flows across Countries and Industries279 cited
• 1981The Determinants of Tariff and Nontariff Trade Restrictions in the United States237 cited
• 1996Do National Borders Matter for Quebec's Trade?229 cited
• 1995Do National Borders Matter for Quebec's Trade?