Ho K, Pakes A, Shepard M. The Evolution of Health Insurer Costs in Massachusetts, 2010-12. Review of Industrial Organization. Forthcoming. hopakesshepard_010317_withappendix.pdf
Pakes A. Empirical Tools and Competition Analysis: Past Progress and Current Problems. International Journal of Industrial Organization. Forthcoming.Abstract

I review a subset of the empirical tools available for competition analysis. The tools discussed are those needed for the empirical analysis of; demand, production efficiency, product repositioning, and the evolution of market structure. Where relevant I start with a brief review of tools developed in the 1990’s that have recently been incorporated into the analysis of actual policy. The focus is on providing an overview of new developments; both those that are easy to implement, and those that are not quite at that stage yet show promise.

Pakes A. Methodological Issues in Analyzing Market Dynamics. In: Advances in Dynamic and Evolutionary Games: Theory, Applications, and Numerical Methods . F. Thuijsman & F. Wagener (eds.) . Switzerland: Springer International Publishing ; 2016. pp. 43-75.Abstract

This paper investigates progress in the development of models capable of empirically analyzing the evolution of industries. It starts with a parallel between the development of empirical frameworks for static and dynamic analysis of industries: both adapted their frameworks from models taken from economic theory. The dynamic framework has had its successes: it led to developments that have enabled us to control for dynamic phenomena in static empirical models and to useful computational theory. However when important characteristics of industries were integrated into that framework it generated complexities which both hindered empirical work on dynamics per se, and made it unrealistic as a model of agent behavior. This paper suggests a simpler alternative paradigm, one which need not maintain all the traditional theoretical restrictions, but does maintain the core theoretical idea of optimizing subject to an information set. It then discusses estimation, computation, and an example within that paradigm.

Pakes A, Porter J, Ho K, Ishii J. Moment Inequalities and Their Application. Econometrica. 2015;83 (1) :315-334. Prior and longer version proof_appendix_pphi_2011.pdf published version
Ho K, Pakes A. Hospital Choices, Hospital Prices, and Financial Incentives to Physicians. American Economic Review [Internet]. 2014;104 (12) :3841-3884. Publisher's VersionAbstract

We estimate an insurer-speci…c preference function which rationalizes hospital referrals for privately-insured births in California. The function is additively separable in: a hospital price paid by the insurer, the distance traveled, and plan and severity-speci…c hospital …xed e¤ects (capturing hospital quality). We use an inequality estimator that allows for errors in price and detailed hospital-severity interactions and obtain markedly di¤erent results than those from a logit. The estimates indicate that insurers with more capitated physicians are more responsive to price. Capitated plans send patients further to utilize similar-quality lower-priced hospitals; but the cost-quality trade-o¤ does not vary with capitation rates.

Ho K, Pakes A. Physician Payment Reform and Hospital Referrals. American Economic Review Paper and Proceedings [Internet]. 2014;104 (5) :200-205. Publisher's Version
Pakes A. Behavioral and Descriptive Forms of Choice Models . International Economic Review. 2014;55 (3) :603-624. behavioralanddescriptiveformsofchoice-a.pdf
Fershtman C, Pakes A. Dynamic Games with Asymmetric Information: A Framework for Empirical Work. Quarterly Journal of Economics. 2012;127 (4) :1611-1661. PDF
Ho K, Pakes A. Do Physician Incentives Affect Hospital Choice? A Progress Report. International Journal of Industrial Organization . 2011;29 (3) :317-322. hopakes_ijio_111510.pdf
Erickson T, Pakes A. An Experimental Component Index for the CPI: From Annual Computer Data to Monthly Data on Other Goods. American Economic Review. 2011;101 (5) :1707-1738. ericksonpakes12a.pdf
Pakes A. Alternative Models for Moment Inequalities. Econometrica. 2010;78 (6) :1783-1822. fs3.pdf
Lee RS, Pakes A. Multiple Equilibria and Selection by Learning in an Applied Setting. Economic Letters. 2009;104 (1) :13-16. multipleequilibria.pdf
Doraszelski U, Pakes A. A Framework for Applied Dynamic Analysis in IO. In: Armstrong M, Porter R The Handbook of Industrial Organization. Vol. 3. New York: Elsevier ; 2007. pp. Chapter 33 2183-2162. handbookio9.pdf
Berry S, Pakes A. The Pure Characteristics Demand Model. International Economic Review. 2007;48 (4) :1193-1225. ierbp-purechar-7-07.pdf
Ackerberg D, Benkard L, Berry S, Pakes A. Econometric Tools for Analyzing Market Outcomes. In: Heckman J, Leamer E The Handbook of Econometrics. Vol. 6A. Amsterdam: North-Holland ; 2007. pp. 4171-4276. tools8l.pdf