Mathematical and Statistical Methods in Econometrics. Linear algebra and matrix methods in econometrics (H. Theil). Statistical theory and econometrics (A. Zellner). Econometric Models. Economic and econometric models (M.D. Intriligator). Identification (C. Hsiao). Model choice and specification analysis (E.E. Leamer). Estimation and Computation. Non-linear regression models (T. Amemiya). Specification and estimation of simultaneous equation models (J.A. Hausman). Exact small sample theory in the simultaneous equations model (P.C.B. Philipps). Bayesian analysis of simultaneous equation systems (J.H. Drèze, J.-F. Richard). Biased estimation (G.G. Judge, M.E. Bock). Estimation for dirty data and flawed models (W.S. Krasker, E. Kuh and R.E. Welsch). Compuational problems and methods (R.E. Quandt).