Sequential Innovation, Patents, And Imitation

A Heteroskedasticity-Consistent Covariance Matrix Estimator and a Direct Test for Heteroskedasticity

Halbert White · Econometrica · 1980 · 26.1K citations

Social Sciences, Economics, Econometrics +11

Industrial Market Structure and Economic Performance.

H. Michael Mann, F. M. Scherer · The Journal of Finance · 1971 · 6.4K citations

Social Sciences, Business Economics, Economics +14

Appropriating the Returns from Industrial Research and Development

Richard C. Levin, Alvin K. Klevorick, Richard R. Nelson et al. · Brookings Papers on Economic Activity · 1987 · 3.8K citations · Full text

Social Sciences, Business Economics, Economics +12

Econometric Models for Count Data with an Application to the Patents-R & D Relationship

Jerry A. Hausman, Bronwyn H. Hall, Zvi Griliches · Econometrica · 1984 · 3.4K citations

Social Sciences, Business Economics, Economics +17

Econometric models based on count data. Comparisons and applications of some estimators and tests

A. Colin Cameron, Pravin K. Trivedi · Journal of Applied Econometrics · 1986 · 1.8K citations

Social Sciences, Economics, Econometrics +16