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Information and exchange rate dynamics

By Mark A. (Mark Andrew) Roberts


Theoretical models of the exchange rate are developed where\ud information on the model is not fully available to agents. It is an\ud application of Benjamin Friedman's (1979) theme that full rational\ud expectations may be a possibility only in the long-run, even for\ud completely rational individuals. The thesis attempts to develop the\ud theory of exchange rate behaviour by considering some neglected\ud informational issues.\ud The three substantive chapters each consider specific aspects of\ud relevance to the determination of the exchange rate from an asset market\ud view of perfect capital mobility. These are the possible current\ud account inter-relationship, the persistence of interest rate\ud differentials between the two currencies and the subjectivity of and the\ud regress in beliefs across a decentralised market.\ud Generally, limited information on the model will give rise to\ud erroneous beliefs, on the one hand, and encourage the acquistion of\ud information and the revision of beliefs, on the other. Erroneous\ud beliefs will cause correlations between variables, which may not\ud normally occur inside full rational expectations. The revision of\ud beliefs will bring a particular source of non-stationarity to the data.\ud And the stability of certain learning forms may require limitations on\ud the degree of capital mobility.\ud These conclusions would suggest that any empirical work on\ud modelling the exchange rate may gain from relaxing certain a priori\ud restrictions, which properly belong to models with stronger assumptions\ud on the availability of information

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OAI identifier: oai:wrap.warwick.ac.uk:4460

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  1. (1984). ('967) 'T"J.he Random Character of Stock l-larket
  2. (1975). 112 convergent learning. Convergent learning may lead to a strong-form of REE of homogeneous expectations where all agents observe the same signals. Kihlstrom and Mirman
  3. (1976). 155 This externality is different to the kind of externality perceived by Grossman
  4. (1920). 2.2 The Asset Market View of the Exchange Rate and the Role of the Current Account Early models of the exchange rate [Bickerdicke
  5. (1979). 2~ It is also an empirical matter whether wealth effects would have greater weight in a portfolio-balance framework. A theoretical case for this possibility is made by the 'preferred local habitant' variant model [e.g. Dooley and Isard
  6. (1980). 3.2 Rational Bubbles 3.2.1 Multiplicity The consideration of bubbles is a break from the fundamental framework. Flood and Garber
  7. (1982). 36 The construction is an application of Hellwig's
  8. (1969). A Bayesian approach to the theory of expectations', doi
  9. (1976). A monetary approach to the exchange rate: doctrinal and empirical evidence', doi
  10. (1978). A proposal for international monetary reform:
  11. (1975). A simple perfect foresight monetary model', doi
  12. (1981). An accounting framework and some issues for modelling exchange rates l , Federal Reserve System Board
  13. (1985). and
  14. (1983). and Di Tata
  15. (1967). and Feiger
  16. (1979). and Isard
  17. (1983). Balance of payments and the foreign exchange market: a dynamic partial equilibrium model', doi
  18. (1970). Bayesian analysis and duopoly theory', doi
  19. (1986). Bubbles Exchange rate movements might be considered outside the framework of REE. In this subsection we refer to two non-rational bubble models given by Armington
  20. (1982). Bubbles, rational expectations and financial markets', Discussion Paper 877, doi
  21. (1977). Conditions for unique solutions in stochastic models with rational expectations', doi
  22. (1985). Consequently the application of a particular REE path can be justified by the same criterion. A rational expectations bubble is the~ seen :s economically feasible, if agents were able to cOnVtHg.e: un ~uc-h an equilibrium. Papers by Evans
  23. (1977). describes the strong-form REE solution of the model. The problem of determining the long-run equilibrium, which generally affects dynamic REE models [see Shiller
  24. (1986). designates this a weak-form of the rational expectations hypothesis.
  25. Divergent rational expectations eqt·ilibrium in a re~ger, ' .. '- , dynamic market model of futures markets',
  26. (1981). Diverse information and market efficiency in a monetary model of the exchange rate', doi
  27. (1983). Do sunspots matter?', doi
  28. (1976). Dooley and Isard
  29. (1984). Dynamic instability in rational expectations illodels: an attempt to clarify', doi
  30. (1948). Economics and knowledge' in Individualism and Economic Order, by F.A. doi
  31. (1970). Efficient capital markets: a review of theory and empirical work', doi
  32. (1984). Empirical models of the exchange rate: separating the wheat from the chaff', doi
  33. (1983). Empirical regularities in the behaviour of exchange rates and theories of the foreign exchange market' doi
  34. (1982). Equilibrium and disequilibrium exchange rates', Zeitschrift fur Wirtschafts und Sozialmissenschaft, doi
  35. (1977). Exchange rate dynamics with stock/flow interaction', doi
  36. (1987). Exchange rate dynamics: bubbles vs. learning', University of Reading, Discussion Paper in Economics, Series
  37. (1984). Exchange rate movements and adjustments in financial markets: quarterly estimates for major currencies' doi
  38. (1985). Expectational stability and the mUltiple equilibria problem in linear rational expectations models', doi
  39. (1976). Expectations and exchange rate d)T,amics', doi
  40. (1983). Expectations of others' expectations and the transitional non-neutrality of fully believed systematic monetary policy', doi
  41. (1980). Expected and unexpected chan~e in exchange rates: :
  42. (1976). Flexible exchange rates in the short run', doi
  43. (1980). Fluctuations in the dollar: a model of nominal and real exchange rate determination', doi
  44. For those who have supported me, family and friends 1
  45. (1966). Forecasts of future prices, unbiased market.5, and Martinga11 models',
  46. (1980). Forward exchange rates as optimal predictors of future spot rates: an econometric analysis', doi
  47. (1948). Foundations of Economic Analysis, doi
  48. (1976). Foundations of Finance,
  49. (1980). has related evidence that the effect3 of w€a~:h arE not empirically significant.
  50. (1936). Here, the beliefs of others become state variables in the model. We take Keynes
  51. (1970). If agents are Bayesians, then the weightings must be constrained to make learning consistent with optimal decision theory [DeGroot
  52. (1975). IInformation and market equilibrium', doi
  53. (1982). In search of the exchange risk premium: a six country test assuming mean-variance optimization', doi
  54. (1983). Individual Forecasting and Aggregace Outcomes, doi
  55. (1983). Individual rationality, decentralization and the rational expectations hypothesis' doi
  56. (1976). Information and competitive price systems',
  57. (1944). International Currency Experience: Lessor.s of the Inter-War Period, League of Nations, doi
  58. (1982). Introduction to the stability of rational expectations equilibrium', doi
  59. (1981). Introductory Econometrics, doi
  60. (1971). Investment under uncertainty', doi
  61. (1979). IOn the efficiency of mark~ts for foreign exchange'
  62. (1985). Is the strong dollar sustainable?', doi
  63. (1981). ISe1f-fu1fi11ing prophecies',
  64. (1976). IThe exchange rate and the balance of payments in the short run and in the long run: a monetary approach' . doi
  65. (1982). Learning, estimation and the stability of rational expectations', doi
  66. (1978). Market anticipations of government policies and the price of gold', doi
  67. (1978). Market anticipations, rational expectations dnd Bayesian analysis', doi
  68. (1980). Market fundamentals vs price level bubbles: the first tests', doi
  69. (1981). Mode11i~g ste~li~g's effective exchange rate 1972-9',
  70. (1983). Models from the AMV share the feature of perfect capital mobility, whether they are of the monetary or of the portfolio-balance type [Frankel
  71. (1983). Monetary and portfolio-balance models of exchangE' rate determination' doi
  72. (1975). Monetary policy during a transition to rational expectations', doi
  73. (1985). Multiple perfect foresight equilibrium and convergence of learning process', doi
  74. (1984). New econometric techniques for macroeconomic policy evaluation',
  75. (1985). Nonuniqueness in rational expectations models: an interpretation'. Unpublished paper,
  76. (1983). On non-uniqueness in rational expectations models: an attempt at perspective', doi
  77. (1988). On risk, rationality and excessive speculation in the deutschemark-US dollar exchange rat2: some evidence using survey data', doi
  78. (1980). On some conceptual issues in rational expectations modelling', doi
  79. (1976). On the efficiency of competitive stock markets where traders have diverse information', doi
  80. (1980). On the impossibility of informationa11y efficient markets' doi
  81. (1979). Optimal expectations and the extreme information assumptions of "rational expectations" macromode1s', doi
  82. (1970). Optimal Stacistical Decisions,
  83. (1968). Pitfalls in financial model building', American Economic Review, Papers and Proceedings,
  84. (1965). Proof that properly anticipated prices fluctuate randomly',
  85. (1974). Rational expectations and Bayesian analysis', doi
  86. (1978). Rational expectations and the dynamic 5tructure of macroeconomic models', doi
  87. (1976). Rational expectations and the role of mon~cary policy',
  88. (1961). Rational expectations and the theory of prit::'e movements',
  89. (1986). Rational expectations equilibria, learning and model specification', doi
  90. (1982). Rational expectations equilibrium with conditioning on past prices: a mean-variance example', doi
  91. (1975). Rational expectations, the optimal monetary instrument, and the optimal money supply rule' doi
  92. (1986). Ruling our divergent speculative bubbles', doi
  93. (1986). Section 3.3 looks first briefly at the Peso problem, which we view as a problem which belongs essentially to the short-run, and then at irrational bubbles emanating from model-inconsistent expectations. In one example, given by Armington
  94. (1961). So the problem does not occur in Muth's
  95. (1953). Speculation will then be stabilising as envisaged by Friedman
  96. (1983). Speculative hyperinflations in maximizing models: can we rule them out?'; doi
  97. (1977). Stabilizing powers of monetary policy under rational expectations', doi
  98. (1983). Testing rationa] expectations and efficiency in the foreign exchange market' doi
  99. (1980). The "Peso Problem" in testing the efficiency of forward exchange markets', doi
  100. (1972). The AMV version of the exchange rate is affected only by unobservable current account movements which cannot be anticipated. There is some analogy to the new-classical macroeconomic models [e.g. in Lucas
  101. (1953). The case for flexible exchange rates',
  102. (1985). The dazzling dollar;, doi
  103. (1985). The decline and fall of the dollar: some policy issues', doi
  104. (1982). The Determinacy of the Inconsistent Forecast FQ~ction Frydman
  105. (1986). The dollar as a speculative an e, .. bubble: a tale of fundamentalists and chartists', doi
  106. (1982). The efficient markets theory literature [reviewed by Andersen
  107. (1977). The existence of futures markets, noisy rational expectations and informational externalities', doi
  108. (1937). The foreign exchanges'. in Essays in the Theory of Employment,
  109. (1978). The future and the present in economic life'i doi
  110. (1982). The literature on learning [reviewed by Blume, Bray and Easley
  111. (1985). The monetary approach to exchange rate determination under rational expectations: the dollar-deutschemark rate', doi
  112. (1978). The monetary approach to the exchange rate: evidence', doi
  113. (1956). The monetary dynamics of hyperinflation', doi
  114. (1987). The out-of-sample forecasting performance of exchange rate models when coefficients are allowed to vary', International Finance Discussion Pape~ 301, Washington BOdrd of Governors of the Federal Reserve System.
  115. (1979). The portfolio-balance model of exchar.ge rates',
  116. (1956). The quantity theory of money - a restatement', doi
  117. (1984). The same result was used by Backus
  118. (1983). The second difference is that in Kouri
  119. (1978). The second possibility is where agents are in a (dynamic) REE, but are learning the long-run equilibrium. There are an infinity of possibilities because of the dynamic structure of the model [Shiller
  120. (1973). The stability of models of money and growth with perfect foresight', doi
  121. (1939). The theory of foreign exchanges", doi
  122. (1936). The third area of discussion is Keynes'
  123. (1983). The trouble with "rational expectations" and the problem of inflation stabilisation'
  124. (1985). there was a consensus that the dollar was overvalued. The discussion was largely over whether there would be a hard-landing or a soft-landing. Frankel
  125. (1974). This is the first strategy to be considered. The second strategy will be an inconsistent learning example akin to the one given by Cyeri and DeGroot
  126. (1986). Toward: understanding major fluctuations of the dollar', Internal Paper No. 43, The Directorate-General for Economics and Financial Affairs.
  127. (1982). Towards an understanding of market processes: irldividual expectations, learning and convergence to rational expectations equilibrium',
  128. (1981). Understanding Business Cycles, doi
  129. (1987). Using survey data to test !'lome r an_ e
  130. (1985). Was it real?', International F.lnance Discussion Paper 268, Washington Board of Governors of the Federal Reserve System.
  131. (1974). We refer to the cobweb learning models of Cyert and DeGroot

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