The New Palgrave Dictionary of Economics

2018 Edition
| Editors: Macmillan Publishers Ltd

s-S Models

  • John Leahy
Reference work entry
DOI: https://doi.org/10.1057/978-1-349-95189-5_2281

Abstract

The s-S model is the canonical model of infrequent and discrete action. It has been used to explain inertia in durable goods, investment, money demand, and cash management, and to provide microfoundations for price stickiness and the real effects of money. In the model, fixed costs make small adjustment impractical. Agents allow their state to drift in response to shocks until it reaches an adjustment trigger before setting it to a target value. This article reviews the microeconomic comparative statics of the optimal s-S policy, as well as the implications of discrete individual adjustment aggregate dynamics.

Keywords

Adjustment costs Adverse selection Arrow, K. J. Curse of dimensionality Frictions Inventory theory Markov processes Marschak, J. Microfoundations Neutrality of money One-sided rules s-S models State dependence Sticky prices Taylor’s theorem Two-sided rules 

JEL Classifications

C6 E22 
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Bibliography

  1. Abel, A., and E. Eberly. 1994. A unified model of investment under uncertainty. American Economic Review 84: 1369–1384.Google Scholar
  2. Arrow, K., T. Harris, and J. Marschak. 1951. Optimal inventory policy. Econometrica 19: 205–272.Google Scholar
  3. Ball, L., and D. Romer. 1990. Real rigidities and the non-neutrality of money. Review of Economic Studies 57: 183–203.CrossRefGoogle Scholar
  4. Bar-Ilan, A., and A. Blinder. 1996. Consumer durables: Evidence on the optimality of usually doing nothing. Journal of Money, Credit and Banking 24: 258–272.CrossRefGoogle Scholar
  5. Barro, R. 1972. A theory of monopolistic price adjustment. Review of Economic Studies 39: 17–26.CrossRefGoogle Scholar
  6. Baumol, W. 1952. The transactions demand for cash: An inventory theoretic approach. Quarterly Journal of Economics 66: 545–556.CrossRefGoogle Scholar
  7. Bertola, G., and R. Caballero. 1990. Kinked adjustment costs and aggregate dynamics. In NBER Macroeconomics Annual 1990, ed. O. Blanchard and S. Fischer. Cambridge, MA: MIT Press.Google Scholar
  8. Blinder, A. 1981. Retail inventory behavior and business fluctuations. Brookings Papers on Economic Activity 1981(2): 443–505.CrossRefGoogle Scholar
  9. Caballero, R. 1993. Durable goods: An explanation for their slow adjustment. Journal of Political Economy 101: 351–384.CrossRefGoogle Scholar
  10. Caballero, R., and E. Engel. 1991. Dynamic (S, s) economies. Econometrica 59: 1659–1686.CrossRefGoogle Scholar
  11. Caballero, R., and E. Engel. 1999. Explaining investment dynamics in US manufacturing: A generalized (S, s) approach. Econometrica 67: 741–782.CrossRefGoogle Scholar
  12. Caplin, A. 1985. The variability of aggregate demand with (S, s) inventory policies. Econometrica 53: 1395–1410.CrossRefGoogle Scholar
  13. Caplin, A., and J. Leahy. 1991. State-dependent pricing and the dynamics of money and output. Quarterly Journal of Economics 106: 683–708.CrossRefGoogle Scholar
  14. Caplin, A., and J. Leahy. 1994. Business as usual, market crashes and wisdom after the fact. American Economic Review 84: 548–565.Google Scholar
  15. Caplin, A., and J. Leahy. 1997. Aggregation and optimization with state-dependent pricing. Econometrica 65: 601–623.CrossRefGoogle Scholar
  16. Caplin, A., and J. Leahy. 2004. On the relationship between representative agent models and (S, s) models. In Productivity, East Asia Seminar on Economics, ed. T. Ito and A. Rose, Vol. 13. Chicago: University of Chicago Press.Google Scholar
  17. Caplin, A., and J. Leahy. 2006. Equilibrium in a durable goods market with lumpy adjustment. Journal of Economic Theory 128: 187–213.CrossRefGoogle Scholar
  18. Caplin, A., and D. Spulber. 1987. Menu costs and the neutrality of money. Quarterly Journal of Economics 102: 703–725.CrossRefGoogle Scholar
  19. Danziger, L. 1999. A dynamic economy with costly price adjustments. American Economic Review 89: 878–901.CrossRefGoogle Scholar
  20. Dixit, A. 1991. Analytic approximations in models of hysteresis. Review of Economic Studies 58: 141–152.CrossRefGoogle Scholar
  21. Dotsey, M., R. King, and A. Wolman. 1999. State dependent pricing and the general equilibrium dynamics of money and output. Quarterly Journal of Economics 104: 655–690.CrossRefGoogle Scholar
  22. Gertler, M., and J. Leahy. 2006. A Phillips curve with an Ss foundation. Working paper no. 11971. Cambridge, MA: NBER.Google Scholar
  23. Golosov, M., and R. Lucas. 2003. Menu costs and Phillips curves. Working paper no. 10187. Cambridge, MA: NBER.Google Scholar
  24. Grossman, S., and G. Laroque. 1990. Asset pricing and optimal portfolio choice in the presence of illiquid durable consumption goods. Econometrica 58: 25–51.CrossRefGoogle Scholar
  25. House, C., and J. Leahy. 2004. An Ss model with adverse selection. Journal of Political Economy 112: 581–614.CrossRefGoogle Scholar
  26. Mankiw, N. 1985. Small menu costs and large business cycles: A macroeconomic model of monopoly. Quarterly Journal of Economics 100: 529–539.CrossRefGoogle Scholar
  27. Midrigan, V. 2006. Menu costs, multiproduct firms and aggregate fluctuations. Working paper, Ohio State University.Google Scholar
  28. Miller, M., and D. Orr. 1966. A model of demand for money by firms. Quarterly Journal of Economics 80: 413–435.CrossRefGoogle Scholar
  29. Scarf, H. 1959. The optimality of (S, s) policies in the dynamic inventory problem. In Mathematical Methods in Social Sciences, ed. K. Arrow, S. Karlin, and P. Suppes. Stanford: Stanford University Press.Google Scholar
  30. Sheshinski, E., and Y. Weiss. 1977. Inflation and the cost of price adjustment. Review of Economic Studies 44: 287–303.CrossRefGoogle Scholar
  31. Thomas, J. 2002. Is lumpy investment relevant for the business cycle? Journal of Political Economy 110: 508–534.CrossRefGoogle Scholar
  32. Willis, J. 2002. General equilibrium of a monetary model with state-dependent pricing. Working paper, Federal Reserve Bank of Kansas City.Google Scholar

Copyright information

© Macmillan Publishers Ltd. 2018

Authors and Affiliations

  • John Leahy
    • 1
  1. 1.