9.1 INTRODUCTION9.2 MEASURING FIRM SIZE AND GROWTH9.3 MODELING THE SIZE DISTRIBUTION OF FIRMS9.4 GIBRAT'S LAW (GL)9.5 RATIONALIZING THE PARETO FIRM SIZE DISTRIBUTION9.6 MODELING THE GROWTH RATE DISTRIBUTION OF FIRMS9.7 BASIC EMPIRICS OF GIBRAT'S LAW (GL)9.8 CONCLUSIONAPPENDIX 9.A KERNEL DENSITY ESTIMATIONAPPENDIX 9.B THE LOG-NORMAL AND GIBRAT DISTRIBUTIONS (AITCHISON AND BROWN, 1957; KALECKI, 1945)APPENDIX 9.C THE THEORY OF PROPORTIONATE EFFECTAPPENDIX 9.D CLASSICAL LAPLACE DISTRIBUTIONAPPENDIX 9.E POWER-LAW BEHAVIORAPPENDIX 9.F THE YULE DISTRIBUTIONAPPENDIX 9.G OVERCOMING SAMPLE SELECTION BIAS