Nonlinear models with panel data

Panel data play an important role in empirical economics. With panel data one can answer questions about microeconomic dynamic behavior that could not be answered with cross sectional data. Panel data techniques are also useful for analyzing cross sectional data with grouping. This paper discusses some issues related to specification and estimation of nonlinear models using panel data.JEL Classification: C230The research behind this paper was supported by the National Science Foundation, the Gregory C. Chow Econometric Research Program at Princeton University, and Danish National Research Foundation (through CAM at the University of Copenhagen). The author thanks Ekaterini Kyriazidou, Hong Li, Marina Sallustro, and the editors for helpful suggestions.     

A lower bound on computational complexity given by revelation mechanisms

Summary This paper establishes a lower bound on the computational complexity of smooth functions between smooth manifolds. It generalizes one for finite (Boolean) functions obtained (by Arbib and Spira [2]) by counting variables. Instead of a counting procedure, which cannot be used in the infinite case, the dimension of the message space of a certain type of revelation mechanism provides the bound. It also provides an intrinsic measure of the number of variables on which the function depends. This measure also gives a lower bound on computational costs associated with realizing or implementing the function by a decentralized mechanism, or by a game form.This research was supported by National Science Foundation Grant No. IRI-9020270.     

Existence of Equilibria in Matching Models of Money: A New Technique

This paper develops a new technique for proving the existence and indeterminacy of monetary equilibria in money search models with divisible money. Our technique is substantially simpler than standard constructive proofs in the literature. This paper is based on the second half of Kamiya and Shimizu (2002). We are very grateful to the associate editor and an anonymous referee of this journal for their very detailed suggestions and comments. This research is financially supported by Grant-in-Aid for Scientific Research from JSPS and MEXT. The second author also acknowledges the financial support by Zengin Foundation for studies on Economics and Finance.     

The Sun Also Rises: Productivity Convergence Between Japan and the USA

The growth process for a technological leader is different from that of a follower. While followers can grow through imitation and capital deepening, a leader must undertake original research. This suggests that as the gap between the leader and the follower narrows, the follower must undertake more genuinely innovative R&D and possibly face a slower overall growth rate. The results of a dynamic panel equilibrium-correction model of productivity growth suggest that the productivity gap with the USA had a strong effect on the growth of Japanese manufacturing, and that changes in R&D intensity also made a significant contribution. Moreover, the effect of the productivity gap was significantly higher in industries that had higher R&D intensities, higher levels of human capital, and were more open to exports. This paper is based upon Chapter 5 of my D.Phil. thesis at the University of Oxford. It was partly written while I was a Visiting Scholar at the Foundation for Advanced Information & Research, Tokyo, and was supported by a Sanwa Bank Foundation Research Fellowship and ESRC grants R000234954 and R000237500.     

多目标模糊优选理论在深基坑工程方案优选中的应用

基坑方案的设计直接影响着基坑工程的投资规模、生产成本和经济效益的高低，也影响着施工管理方案的制定，其优化设计更是深基坑工程的重要环节。基坑设计方案受许多因素的影响，因而也需要从多个角度去评价方案的优劣。基坑设计方案的优化实质上是实现多重目标的最优，必须运用基于多重目标的模糊综合评价法去评价一个方案的好坏，即用模糊数学对受到多种因素制约的事物或对象做出一个总体的评价。本文将以武汉创世纪广场基坑工程为例，应用多目标模糊优选理论，研究深基坑工程方案的优选。     

Non-existence and inefficiency of equilibria with American options

Summary We analyze two examples of economies with incomplete financial markets. In the first model we consider a stock and an American put option on the stock. Although there is only one commodity and asset payoffs therefore do not depend on spot prices, we derive robust non-existence of equilibria. In the second model we consider an economy where a stock is the only asset available for trade. We show that it is impossible to complete the market by introducing American put options and that equilibria are inefficient. This example is also robust.We wish to thank Jonathan Berk, Virginia France, Flavio Menezes and a referee of this journal for useful comments. This research was partially funded by the National Science Foundation (SES-8821723).     

Impostors in the Temple,by Martin Anderson

The Teaching Innovations Program (TIP) was a six-year project funded by the National Science Foundation that gave economics instructors the opportunity to learn interactive teaching strategies for use in undergraduate economics courses. TIP participants first attended a teaching workshop that presented various teaching strategies. They then could enroll in a follow-up program of online instruction and mentoring to learn more about one or two teaching strategies. TIP participants also had the opportunity to engage in the scholarship of teaching and learning economics to share their work. A retrospective survey was administered to the participants after attending the program to obtain a longitudinal assessment of TIP. This article presents the overall survey findings and discusses the results from each TIP phase (workshop, online instruction, and scholarship).     

Popular Support for Climate Change Mitigation: Evidence from a General Population Mail Survey

Using a sample of 1,651 US households, we explore some determinants of willingness to pay (WTP) for climate change mitigation programs. Our mail survey had a relatively low response rate, so we first use several additional data sources to build a detailed sample selection model. This model uses features of the survey instrument, measures of geographic vulnerability to climate change, seasonality, the political mix in the county, attributes of the address or addressee, and a set of factor scores from an extensive factor analysis of all census tracts in the US. We estimate this model jointly with a model to explain climate policy preferences as a function of the domestic and international distribution of policy costs as well as the climate change impacts that each respondent believes will occur under a policy of business-as-usual. Despite statistically significant patterns of nonresponse, selectivity effects are minimal in this case. WTP for climate change mitigation is greater when the domestic incidence of mitigation costs is borne mostly through higher energy taxes. It is also greater when costs are understood to be shared internationally with other groups of countries, rather than being borne mostly by a country group including the US. People are generally more willing to pay for climate change mitigation if they believe that the harm caused by climate change impacts will be substantial, rather than just moderate. The assistance of former UCLA undergraduate students Ivka Adam, Tashi Ghale, Michelle Gogolewski, Vilija Gulbinas, and Lindy Olsson was essential to survey development and administration. This paper is based upon work supported in part by the National Science Foundation under Grant No. 9818875 to UCLA, with additional support from the Raymond F. Mikesell Foundation at the University of Oregon. Any opinions, findings, and conclusions or recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of either the National Science Foundation or ICF International.     

Optimality for controlled jump processes: a simple approach

Summary This note presents a very simple method for deriving the necessary optimality conditions for optimal control of jump (point) processes. By means of Bellman's principle of optimality, the original stochastic control problem is transformed into a simple optimization problem. The derivation is remarkably simpler than the existing ones in the literature.I am grateful to the referee for many useful comments and suggestions. This research was supported in part by the Bradley Foundation and the Hewlett Foundation.     

Incentives,information, and organizational design

NÖG Lecture delivered to the annual meeting of the Austrian Economic Society, Vienna, September 29, 1988. Financial support from the Olin Foundation, the National Science Foundation, and the Hoover Institution is gratefully acknowledged. This paper is partly based on joint work undertaken with Raaj K. Sah, to whom I am most indebted. I have also benefitted greatly from conversations with Joseph Farrell. Research assistance of Serge Marquié and Rohit Rahi is gratefully acknowledged.     

企业型基金会推动社会企业成效之研究——以中华电信基金会方案为例

本研究透过社会企业概念与运作型态的分析，提升企业型基金会在社会企业方案推动成效和社会影响性。研究发现中华电信基金会采取社会企业方案的宗旨，在于缩短社会数字落差、协助传统文化产业、耕耘小区生活等，所有项目的规划和执行皆以永续经营为主轴。在中华电信基金会仅两、三年的运作之后，当社会大秉听到“数字好厝边”就是中华电信关怀偏乡地区的数字培力；而中华电信基金会的社会企业方案，具体产生封社会良性的影响与善尽企业社会责任，也可成为企业型基金会在推动社会企业时的参考范例。     

Mortality,Human Capital and Persistent Inequality

Available evidence suggests high intergenerational correlation of economic status and persistent disparities in health status between the rich and the poor. This paper proposes a mechanism linking the two. We introduce health capital into a two-period overlapping generations model. Private health investment improves the probability of surviving from the first period of life to the next and, along with education, enhances an individual’s labor productivity. Poorer parents are of poor health, unable to invest much in reducing mortality risk and improving their human capital. Consequently, they leave less for their progeny. Despite convex preferences and technologies, initial differences in economic and health status may perpetuate across generations when annuities markets are imperfect.Additional support was provided by the National Science Foundation. Additional support was provided by the National Science Foundation.     

Information,capital, and organization

Summary This paper examines on of the roles that information plays in the production process by looking at the information that firms collect about their workers. This information, concerning the worker's abilities, is used to improve the quality of job matches within the firm and reduce future production costs. This paper models this information as a capital good and shows how the existence of this capital good can be used to explain some of the residual firm value observed in equity markets as well as the rigidities observed when firms expand their scale.I would like to acknowledge the assistance of Edward Prescott, Hugo Hopenhayn, Herbert Mohring and Jim Schmitz who provided many insights and comments concerning this work. This paper has benefited from the comments and suggestions of seminar participants at Minnesota, Western Ontario and Caltech. This research was supported in part by grants from the Alfred P. Sloan Foundation and a National Science Foundation Graduate Fellowship.     

A theorem on open coverings of a simplex and Scarf's core existence theorem through Brouwer's fixed point theorem

Summary This paper provides simple proofs of a theorem on open coverings of a simplex and Scarf's core existence theorem through Brouwer's fixed point theorem.I want to thank Daniel Abrams, Yakar Kannai, Herbert Scarf, Nicholas Yannelis, Jingang Zhao, and an anonymous referee for their helpful comments. I also gratefully acknowledge the financial support from the Alfred P. Sloan Foundation.     

Production, interest, and saving in deterministic economies with additive endowments

Stationary equilibria are constructed for a series of nonstochastic production economies in which the decisions of producers, wage earners, shareholders, and savers modulate, via a “production function”, the endowment variables in an additive manner. The efficiency of each model is compared to that of a single agent who produces for personal consumption.Most of this work was carried out during the spring of 2004, while Sudderth was visiting the Cowles Foundation at Yale University. The work of Karatzas was supported by the National Science Foundation under grant NSF-DMS-06-01774, and by the Institute for Mathematics and Its Applications (IMA) which made possible a visit to the University of Minnesota during a week in May 2004. The support of these foundations is gratefully acknowledged.     

Non-stationary,stable Markov processes on a continuous state space

We extend our previous result on simple stable Markov (SSM) processes to the case where the state space is continuous. As anapplication we show the existence of a competitive general equilibrium of a cobweb model where price volatility is generated both by exogenous shocks and by stochastic, so called generating variables (that may be interpreted as sunspots) that govern the correlation of the rational beliefs of individual agents. I would like to thank Danish Social Science Foundation, The Carlsberg Foundation, Stanford Institute for Theoretical Economics (SITE) and Universita Cattolica for financial help. I would also like to thank Trinidad Casasus, Mordecai Kurz, an anonymous referee as well as participants at SITE, ESAM (2004) and ESEM (2004) for helpful discussions and comments. Peter Harremoes provided me with an illuminating counter example and Hiro Nakata provided many comments that helped improve the exposition of the paper. Part of this work is from a paper previously circulated under the title: “Sunspot rational belief structures: anonymity and endogenous uncertainty”.     

Strength of preference and cardinal utility

Summary. This paper provides simpler and more general preference foundations for difference representations than known before and shows how to obtain cardinal utility from those difference representations. In addition, this paper unifies all earlier derivations of cardinal utility by showing that they are implied as direct corollaries.Received: 9 November 2002, Revised: 27 December 2004, JEL Classification Numbers: C6.The author particularly thanks Peter P. Wakker and an anonymous referee for many helpful comments and suggestions. The author also thanks Han Bleichrodt and Horst Zank. The paper was partly written during a visit at the Kellogg School of Management, Northwestern University. The author thanks the Dutch Science Foundation NWO for financial support under grant 425-11-003.     

从美国物质科学资助转变看学科均衡发展

本文介绍了美国从70年代至今对物质科学资助的转变历程,探究其资助转变背后对于学科均衡发展的考量,其中,重点讨论美国国家科学基金会(NSF)在保持美国学科均衡发展中的重要作用和美国在不同时期通过资助转变对学科发展失衡的调节.最后,文章还就美国围绕学科均衡发展进行资助调整对我国的启示进行了分析.     

Market clearing, utility functions, and securities prices

Summary. We prove the existence of equilibrium in a continuous-time finance model; our results include the case of dynamically incomplete markets as well as dynamically complete markets. In addition, we derive explicitly the stochastic process describing securities prices. The price process depends on the risk-aversion characteristics of the utility function, as well as on the presence of additional sources of wealth (including endowments and other securities). With a single stock, zero endowment in the terminal period, and Constant Relative Risk Aversion (CRRA) utility, the price process is geometric Brownian motion; in essentially any other situation, the price process is not a geometric Brownian motion.JEL Classification Numbers: D52.This paper is part of my Dissertation (UC Berkeley). I am very grateful to my advisor Professor Robert M. Anderson. I also would like to thank Steve Evans, Roger Purves, Jacob Sagi, Chris Shannon and the participants of the 2002 NBER General Equilibrium Conference at the University of Minnesota (Minneapolis) for very helpful discussions and comments. This work was supported by Grant SES-9710424 from the National Science Foundation.