Behavior in a Dynamic Decision Problem: An Analysis of Experimental Evidence Using a Bayesian Type Classification Algorithm
Author
Suggested Citation
Download full text from publisher
As the access to this document is restricted, you may want to look for a different version below or search for a different version of it.
Other versions of this item:
- Daniel Houser & Michael Keane & Kevin McCabe, 2002. "Behavior in a dynamic decision problem: An analysis of experimental evidence using a bayesian type classification algorithm," Experimental 0211001, University Library of Munich, Germany.
References listed on IDEAS
- McKelvey, Richard D & Palfrey, Thomas R, 1992.
"An Experimental Study of the Centipede Game,"
Econometrica, Econometric Society, vol. 60(4), pages 803-836, July.
- McKelvey, Richard D. & Palfrey, Thomas., 1991. "An Experimental Study of the Centipede Game," Working Papers 732, California Institute of Technology, Division of the Humanities and Social Sciences.
- Richard McKelvey & Thomas Palfrey, 1999. "An experimental study of the centipede game," Levine's Working Paper Archive 521, David K. Levine.
- Haltiwanger, John & Waldman, Michael, 1985.
"Rational Expectations and the Limits of Rationality: An Analysis of Heterogeneity,"
American Economic Review, American Economic Association, vol. 75(3), pages 326-340, June.
- John Haltiwanger & Michael Waldman, 1983. "Rational Expectations and the Limits of Rationality: An Analysis of Heterogeneity," UCLA Economics Working Papers 303, UCLA Department of Economics.
- Ellison, Glenn & Fudenberg, Drew, 1993.
"Rules of Thumb for Social Learning,"
Journal of Political Economy, University of Chicago Press, vol. 101(4), pages 612-643, August.
- Ellison, Glenn & Fudenberg, Drew, 1992. "Rules of Thumb for Social Learning," IDEI Working Papers 17, Institut d'Économie Industrielle (IDEI), Toulouse.
- Ellison, Glenn & Fudenberg, Drew, 1993. "Rules of Thumb for Social Learning," Scholarly Articles 3196332, Harvard University Department of Economics.
- G. Ellison & D. Fudenberg, 2010. "Rules of Thumb for Social Learning," Levine's Working Paper Archive 435, David K. Levine.
- Allison, G. & Fudenberg, D., 1992. "Rules of Thumb for Social Learning," Working papers 92-12, Massachusetts Institute of Technology (MIT), Department of Economics.
- Heckman, James & Singer, Burton, 1984. "A Method for Minimizing the Impact of Distributional Assumptions in Econometric Models for Duration Data," Econometrica, Econometric Society, vol. 52(2), pages 271-320, March.
- Goeree, Jacob K. & Holt, Charles A. & Palfrey, Thomas R., 2002.
"Quantal Response Equilibrium and Overbidding in Private-Value Auctions,"
Journal of Economic Theory, Elsevier, vol. 104(1), pages 247-272, May.
- Palfrey, Thomas R. & Goeree, Jacob & Holt, Charles, 2000. "Quantal Response Equilibrium and Overbidding in Private-value Auctions," Working Papers 1073, California Institute of Technology, Division of the Humanities and Social Sciences.
- Thomas Palfrey, 2002. "Quantal Response Equilibrium and Overbidding in Private Value Auctions," Theory workshop papers 357966000000000089, UCLA Department of Economics.
- Jacob K. Goeree & Charles A. Holt & Thomas R. Palfrey, 2000. "Quantal Response Equilibrium and Overbidding in Private-Value Auctions," Virginia Economics Online Papers 345, University of Virginia, Department of Economics.
- Cyert, Richard M & DeGroot, Morris H, 1974. "Rational Expectations and Bayesian Analysis," Journal of Political Economy, University of Chicago Press, vol. 82(3), pages 521-536, May/June.
- Houser, Daniel & Winter, Joachim, 2004.
"How Do Behavioral Assumptions Affect Structural Inference? Evidence from a Laboratory Experiment,"
Journal of Business & Economic Statistics, American Statistical Association, vol. 22(1), pages 64-79, January.
- Daniel Houser & Joachim Winter, 2002. "How Do Behavioral Assumptions Affect Structural Inference? Evidence From A Laboratory Experiment," MEA discussion paper series 02005, Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy.
- Houser, Daniel & Winter, Joachim, 2004. "How Do Behavioral Assumptions Affect Structural Inference? Evidence from a Laboratory Experiment," Munich Reprints in Economics 19372, University of Munich, Department of Economics.
- McCabe, Kevin & Houser, Daniel & Ryan, Lee & Smith, Vernon & Trouard, Ted, 2001. "A Functional Imaging Study of Cooperation in Two-Person reciprocal Exchange," MPRA Paper 5172, University Library of Munich, Germany.
- Chib, Siddhartha, 2001. "Markov chain Monte Carlo methods: computation and inference," Handbook of Econometrics, in: J.J. Heckman & E.E. Leamer (ed.), Handbook of Econometrics, edition 1, volume 5, chapter 57, pages 3569-3649, Elsevier.
- John Geweke, "undated".
"Posterior Simulators in Econometrics,"
Computing in Economics and Finance 1996
_019, Society for Computational Economics.
- John Geweke, 1995. "Posterior simulators in econometrics," Working Papers 555, Federal Reserve Bank of Minneapolis.
- McKelvey Richard D. & Palfrey Thomas R., 1995.
"Quantal Response Equilibria for Normal Form Games,"
Games and Economic Behavior, Elsevier, vol. 10(1), pages 6-38, July.
- McKelvey, Richard D. & Palfrey, Thomas R., 1994. "Quantal Response Equilibria For Normal Form Games," Working Papers 883, California Institute of Technology, Division of the Humanities and Social Sciences.
- R. McKelvey & T. Palfrey, 2010. "Quantal Response Equilibria for Normal Form Games," Levine's Working Paper Archive 510, David K. Levine.
- Braunstein, Yale M & Schotter, Andrew, 1982. "Labor Market Search: An Experimental Study," Economic Inquiry, Western Economic Association International, vol. 20(1), pages 133-144, January.
- Andreoni, James, 1995.
"Cooperation in Public-Goods Experiments: Kindness or Confusion?,"
American Economic Review, American Economic Association, vol. 85(4), pages 891-904, September.
- Andreoni, J., 1993. "Cooperation in Public Goods Experiments: Kindness or Confusion?," Working papers 9309, Wisconsin Madison - Social Systems.
- El-Gamal, Mahmoud A. & Palfrey, Thomas R., 1995.
"Vertigo: Comparing structural models of imperfect behavior in experimental games,"
Games and Economic Behavior, Elsevier, vol. 8(2), pages 322-348.
- El-Gamal, Mahmoud A. & Palfrey, Thomas R., 1992. "Vertigo: Comparing Structural Models of Imperfect Behavior in Experimental Games," Working Papers 800, California Institute of Technology, Division of the Humanities and Social Sciences.
- Colin Camerer & Teck-Hua Ho, 1999. "Experience-weighted Attraction Learning in Normal Form Games," Econometrica, Econometric Society, vol. 67(4), pages 827-874, July.
- Geweke, John & Keane, Michael, 2001. "Computationally intensive methods for integration in econometrics," Handbook of Econometrics, in: J.J. Heckman & E.E. Leamer (ed.), Handbook of Econometrics, edition 1, volume 5, chapter 56, pages 3463-3568, Elsevier.
- Engle-Warnick, Jim, 2003.
"Inferring strategies from observed actions: a nonparametric, binary tree classification approach,"
Journal of Economic Dynamics and Control, Elsevier, vol. 27(11-12), pages 2151-2170, September.
- Jim Engle-Warnick, 2000. "Inferring Strategies from Observed Actions: A Nonparametric Binary Tree Classification Approach," Econometrics 0004002, University Library of Munich, Germany, revised 02 Aug 2001.
- Jim Engle-Warnick, 2001. "Inferring Strategies from Observed Actions: A Nonparametric, Binary Tree Classification Approach," Economics Papers 2001-W14, Economics Group, Nuffield College, University of Oxford.
- Charles A. Holt & Jacob K. Goeree, 1999. "Stochastic Game Theory: For Playing Games, Not Just for Doing Theory," Virginia Economics Online Papers 306, University of Virginia, Department of Economics.
- Harrison, Glenn W & Morgan, Peter, 1990.
"Search Intensity in Experiments,"
Economic Journal, Royal Economic Society, vol. 100(401), pages 478-486, June.
- Glenn W. Harrison & Peter Morgan, 1987. "Search Intensity in Experiments," University of Western Ontario, Departmental Research Report Series 8711, University of Western Ontario, Department of Economics.
- Keane, Michael P & Wolpin, Kenneth I, 1994.
"The Solution and Estimation of Discrete Choice Dynamic Programming Models by Simulation and Interpolation: Monte Carlo Evidence,"
The Review of Economics and Statistics, MIT Press, vol. 76(4), pages 648-672, November.
- Michael P. Keane & Kenneth I. Wolpin, 1994. "The solution and estimation of discrete choice dynamic programming models by simulation and interpolation: Monte Carlo evidence," Staff Report 181, Federal Reserve Bank of Minneapolis.
- Daniel Houser & Robert Kurzban, 2002. "Revisiting Kindness and Confusion in Public Goods Experiments," American Economic Review, American Economic Association, vol. 92(4), pages 1062-1069, September.
- Goeree, Jacob K. & Holt, Charles A. & Palfrey, Thomas R., 2003. "Risk averse behavior in generalized matching pennies games," Games and Economic Behavior, Elsevier, vol. 45(1), pages 97-113, October.
- Houser, Daniel, 2003. "Bayesian analysis of a dynamic stochastic model of labor supply and saving," Journal of Econometrics, Elsevier, vol. 113(2), pages 289-335, April.
- Cox, James C & Oaxaca, Ronald L, 1992. "Direct Tests of the Reservation Wage Property," Economic Journal, Royal Economic Society, vol. 102(415), pages 1423-1432, November.
- Hey, John D., 1987. "Still searching," Journal of Economic Behavior & Organization, Elsevier, vol. 8(1), pages 137-144, March.
- John Duffy & Jim Warnick, 1999. "Using Symbolic Regression to Infer Strategies from Experimental Data," Computing in Economics and Finance 1999 1033, Society for Computational Economics.
- Harald Uhlig & Martin Lettau, 1999. "Rules of Thumb versus Dynamic Programming," American Economic Review, American Economic Association, vol. 89(1), pages 148-174, March.
- Cox, James C & Oaxaca, Ronald L, 1989. "Laboratory Experiments with a Finite-Horizon Job-Search Model," Journal of Risk and Uncertainty, Springer, vol. 2(3), pages 301-329, September.
- Keane, Michael P & Wolpin, Kenneth I, 1997.
"The Career Decisions of Young Men,"
Journal of Political Economy, University of Chicago Press, vol. 105(3), pages 473-522, June.
- Michael P. Keane & Kenneth I. Wolpin, 1995. "The career decisions of young men," Working Papers 559, Federal Reserve Bank of Minneapolis.
- Geweke, John & Houser, Dan & Keane, Michael, 1999. "Simulation Based Inference for Dynamic Multinomial Choice Models," MPRA Paper 54279, University Library of Munich, Germany.
Most related items
These are the items that most often cite the same works as this one and are cited by the same works as this one.- Franz Rothlauf & Daniel Schunk & Jella Pfeiffer, 2005.
"Classification of Human Decision Behavior: Finding Modular Decision Rules with Genetic Algorithms,"
MEA discussion paper series
05079, Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy.
- Rothlauf, Franz & Schunk, Daniel & Pfeiffer, Jella, 2005. "Classification of human decision behavior : finding modular decision rules with genetic algorithms," Papers 05-04, Sonderforschungsbreich 504.
- Philip A. Haile & Ali Hortaçsu & Grigory Kosenok, 2008.
"On the Empirical Content of Quantal Response Equilibrium,"
American Economic Review, American Economic Association, vol. 98(1), pages 180-200, March.
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 0820. "On the Empirical Content of Quantal Response Equilibrium," Cowles Foundation Discussion Papers 1432R, Cowles Foundation for Research in Economics, Yale University, revised Jun 0820.
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 2006. "On the Empirical Content of Quantal Response Equilibrium," Working Papers w0076, Center for Economic and Financial Research (CEFIR).
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 2003. "On the Empirical Content of Quantal Response Equilibrium," Cowles Foundation Discussion Papers 1432, Cowles Foundation for Research in Economics, Yale University.
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 2004. "On the Empirical Content of Quantal Response Equilibrium," Yale School of Management Working Papers ysm421, Yale School of Management.
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 2006. "On the Empirical Content of Quantal Response Equilibrium," Working Papers w0076, New Economic School (NES).
- Philip A. Haile & Ali Hortacsu & Grigory Kosenok, 2003. "On the Empirical Content of Quantal Response Equilibrium," Levine's Bibliography 666156000000000215, UCLA Department of Economics.
- Schunk, Daniel, 2005. "Search behaviour with reference point preferences : theory and experimental evidence," Papers 05-12, Sonderforschungsbreich 504.
- Schunk, Daniel & Winter, Joachim, 2009.
"The relationship between risk attitudes and heuristics in search tasks: A laboratory experiment,"
Journal of Economic Behavior & Organization, Elsevier, vol. 71(2), pages 347-360, August.
- Schunk, Daniel & Winter, Joachim, 2004. "The relationship between risk attitudes and heuristics in search tasks : a laboratory experiment," Papers 04-23, Sonderforschungsbreich 504.
- Schunk, Daniel & Winter, Joachim, 2009. "The relationship between risk attitudes and heuristics in search tasks: A laboratory experiment," Munich Reprints in Economics 19880, University of Munich, Department of Economics.
- Daniel Schunk & Joachim Winter, 2005. "The Relationship Between Risk Attitudes and Heuristics in Search Tasks: A Laboratory Experiment," MEA discussion paper series 05077, Munich Center for the Economics of Aging (MEA) at the Max Planck Institute for Social Law and Social Policy.
- Schunk, Daniel & Winter, Joachim, 2007. "The Relationship Between Risk Attitudes and Heuristics in Search Tasks: A Laboratory Experiment," Discussion Papers in Economics 1377, University of Munich, Department of Economics.
- Schunk, Daniel & Winter, Joachim, 2004. "The Relationship Between Risk Attitudes and Heuristics in Search Tasks: A Laboratory Experiment," Sonderforschungsbereich 504 Publications 04-23, Sonderforschungsbereich 504, Universität Mannheim;Sonderforschungsbereich 504, University of Mannheim.
- John Duffy, 2008. "Macroeconomics: A Survey of Laboratory Research," Working Paper 334, Department of Economics, University of Pittsburgh, revised Jun 2014.
- Houser, Daniel & Winter, Joachim, 2000.
"Time preference and decision rules in a price search experiment,"
Sonderforschungsbereich 504 Publications
01-34, Sonderforschungsbereich 504, Universität Mannheim;Sonderforschungsbereich 504, University of Mannheim.
- Houser, Daniel & Winter, Joachim, 2001. "Time preference and decision rules in a price search experiment," Papers 01-34, Sonderforschungsbreich 504.
- James Cox & Ronald Oaxaca, 2000. "Good News and Bad News: Search from Unknown Wage Offer Distributions," Experimental Economics, Springer;Economic Science Association, vol. 2(3), pages 197-225, March.
- Boone, Jan & Sadrieh, Abdolkarim & van Ours, Jan C., 2009.
"Experiments on unemployment benefit sanctions and job search behavior,"
European Economic Review, Elsevier, vol. 53(8), pages 937-951, November.
- van Ours, Jan C. & Boone, Jan & Sadrieh, Abdolkarim, 2004. "Experiments on Unemployment Benefit Sanctions and Job Search Behaviour," CEPR Discussion Papers 4298, C.E.P.R. Discussion Papers.
- Boone, Jan & Sadrieh, Abdolkarim & van Ours, Jan C., 2004. "Experiments on Unemployment Benefit Sanctions and Job Search Behavior," IZA Discussion Papers 1000, Institute of Labor Economics (IZA).
- Boone, J. & Sadrieh, A. & van Ours, J.C., 2004. "Experiments on Unemployment Benefit Sanctions and Job Search Behavior," Discussion Paper 2004-8, Tilburg University, Center for Economic Research.
- Boone, J. & Sadrieh, A. & van Ours, J.C., 2004. "Experiments on Unemployment Benefit Sanctions and Job Search Behavior," Other publications TiSEM 1fb6f48d-f0b5-4c81-b586-8, Tilburg University, School of Economics and Management.
- Schunk, Daniel, 2009. "Behavioral heterogeneity in dynamic search situations: Theory and experimental evidence," Journal of Economic Dynamics and Control, Elsevier, vol. 33(9), pages 1719-1738, September.
- Jacob K. Goeree & Charles A. Holt, 2001.
"Ten Little Treasures of Game Theory and Ten Intuitive Contradictions,"
American Economic Review, American Economic Association, vol. 91(5), pages 1402-1422, December.
- Jacob K. Goeree & Charles A. Holt, 2000. "Ten Little Treasures of Game Theory and Ten Intuitive Contradictions," Virginia Economics Online Papers 333, University of Virginia, Department of Economics.
- Jacob K Goeree & Charles A Holt, 2004. "Ten Little Treasures of Game Theory and Ten Intuitive Contradictions," Levine's Working Paper Archive 618897000000000900, David K. Levine.
- Breitmoser, Yves, 2019.
"Knowing me, imagining you: Projection and overbidding in auctions,"
Games and Economic Behavior, Elsevier, vol. 113(C), pages 423-447.
- Breitmoser, Yves, 2015. "Knowing me, imagining you: Projection and overbidding in auctions," MPRA Paper 62052, University Library of Munich, Germany.
- Breitmoser, Yves, 2016. "Knowing me, imagining you: Projection and overbidding in auctions," MPRA Paper 68981, University Library of Munich, Germany.
- Breitmoser, Yves, 2015. "Knowing me, imagining you: Projection and overbidding in auctions," VfS Annual Conference 2015 (Muenster): Economic Development - Theory and Policy 113160, Verein für Socialpolitik / German Economic Association.
- Daniel Friedman & Kai Pommerenke & Rajan Lukose & Garrett Milam & Bernardo Huberman, 2007.
"Searching for the sunk cost fallacy,"
Experimental Economics, Springer;Economic Science Association, vol. 10(1), pages 79-104, March.
- Daniel Friedman & Kai Pommerenke & Rajan Lukose & Garret Milam & Bernardo A. Huberman, 2004. "Searching for the Sunk Cost Fallacy," Experimental 0407008, University Library of Munich, Germany.
- Daniel Friedman & Kai Pommerenke & Rajan Lukose & Garret Milam & Bernardo A. Huberman, 2004. "Searching for the Sunk Cost Fallacy," Experimental 0407007, University Library of Munich, Germany.
- Jim Engle-Warnick & Bradley Ruffle, 2006. "The Strategies Behind Their Actions: A Method To Infer Repeated-Game Strategies And An Application To Buyer Behavior," Departmental Working Papers 2005-04, McGill University, Department of Economics.
- Camerer, Colin F. & Ho, Teck-Hua & Chong, Juin-Kuan, 2002. "Sophisticated Experience-Weighted Attraction Learning and Strategic Teaching in Repeated Games," Journal of Economic Theory, Elsevier, vol. 104(1), pages 137-188, May.
- Shachat, Jason & Swarthout, J. Todd, 2012.
"Learning about learning in games through experimental control of strategic interdependence,"
Journal of Economic Dynamics and Control, Elsevier, vol. 36(3), pages 383-402.
- Jason Shachat & J. Todd Swarthout, 2002. "Learning about Learning in Games through Experimental Control of Strategic Interdependence," Experimental Economics Center Working Paper Series 2006-17, Experimental Economics Center, Andrew Young School of Policy Studies, Georgia State University, revised Aug 2008.
- Jason Shachat & J. Todd Swarthout, 2011. "Learning about learning in games through experimental control of strategic interdependence," Working Papers 1103, Xiamen Unversity, The Wang Yanan Institute for Studies in Economics, Finance and Economics Experimental Laboratory, revised 28 Apr 2011.
- Jason Shachat & J. Todd Swarthout, 2003. "Learning about Learning in Games through Experimental Control of Strategic Interdependence," Experimental 0310003, University Library of Munich, Germany.
- Jason Shachat & J. Todd Swarthout, 2013. "Learning about learning in games through experimental control of strategic interdependence," Working Papers 2013-10-14, Wang Yanan Institute for Studies in Economics (WISE), Xiamen University.
- Daniela Cagno & Tibor Neugebauer & Carlos Rodriguez-Palmero & Abdolkarim Sadrieh, 2014.
"Recall searching with and without recall,"
Theory and Decision, Springer, vol. 77(3), pages 297-311, October.
- Daniela Di Cagno & Tibor Neugebauer & Carlos Rodriguez-Palmero & Abdolkarim Sadrieh, 2014. "Recall Searching with and without Recall," Working Papers 2014/14, Economics Department, Universitat Jaume I, Castellón (Spain).
- Tibor Neugebauer & Daniela Di Cagno & Carlos Rodriguez-Palmero, & Abdolkarim Sadrieh, 2014. "Recall Searching with and without Recall," LSF Research Working Paper Series 14-09, Luxembourg School of Finance, University of Luxembourg.
- Simon P. Anderson & Jacob K. Goeree & Charles A. Holt, 2002.
"The Logit Equilibrium: A Perspective on Intuitive Behavioral Anomalies,"
Southern Economic Journal, John Wiley & Sons, vol. 69(1), pages 21-47, July.
- Simon P. Anderson & Jacob K. Goeree & Charles A. Holt, 1999. "The Logit Equilibrium: A Perspective on Intuitive Behavioral Anomalies," Virginia Economics Online Papers 332, University of Virginia, Department of Economics.
- Hong, Jieying & Moinas, Sophie & Pouget, Sébastien, 2021. "Learning in speculative bubbles: Theory and experiment," Journal of Economic Behavior & Organization, Elsevier, vol. 185(C), pages 1-26.
- Charness, Gary & Kuhn, Peter, 2011.
"Lab Labor: What Can Labor Economists Learn from the Lab?,"
Handbook of Labor Economics, in: O. Ashenfelter & D. Card (ed.), Handbook of Labor Economics, edition 1, volume 4, chapter 3, pages 229-330,
Elsevier.
- Gary Charness & Peter J. Kuhn, 2010. "Lab Labor: What Can Labor Economists Learn from the Lab?," NBER Working Papers 15913, National Bureau of Economic Research, Inc.
- Charness, Gary & Kuhn, Peter J., 2010. "Lab Labor: What Can Labor Economists Learn from the Lab?," IZA Discussion Papers 4941, Institute of Labor Economics (IZA).
- Christoph Kuzmics & Daniel Rodenburger, 2020. "A case of evolutionarily stable attainable equilibrium in the laboratory," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 70(3), pages 685-721, October.
More about this item
JEL classification:
- C33 - Mathematical and Quantitative Methods - - Multiple or Simultaneous Equation Models; Multiple Variables - - - Models with Panel Data; Spatio-temporal Models
- C11 - Mathematical and Quantitative Methods - - Econometric and Statistical Methods and Methodology: General - - - Bayesian Analysis: General
- C91 - Mathematical and Quantitative Methods - - Design of Experiments - - - Laboratory, Individual Behavior
Statistics
Access and download statisticsCorrections
All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:ecm:emetrp:v:72:y:2004:i:3:p:781-822. See general information about how to correct material in RePEc.
If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.
If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .
If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.
For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Wiley Content Delivery (email available below). General contact details of provider: https://edirc.repec.org/data/essssea.html .
Please note that corrections may take a couple of weeks to filter through the various RePEc services.