Anindya Banerjee, Juan J. Dolado, John W. Galbraith, and David F. Hendry
- Published in print:
- 1993
- Published Online:
- November 2003
- ISBN:
- 9780198288107
- eISBN:
- 9780191595899
- Item type:
- chapter
- Publisher:
- Oxford University Press
- DOI:
- 10.1093/0198288107.003.0004
- Subject:
- Economics and Finance, Econometrics
Methods of testing for a unit root in an observed series are described in this chapter. Both parametric regression tests and non‐parametric adjustments to these test statistics are considered, and ...
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Methods of testing for a unit root in an observed series are described in this chapter. Both parametric regression tests and non‐parametric adjustments to these test statistics are considered, and tables of critical values for commonly used tests are given. The chapter also uses functionals of Wiener processes to describe the asymptotic distributions of important test statistics.Less
Methods of testing for a unit root in an observed series are described in this chapter. Both parametric regression tests and non‐parametric adjustments to these test statistics are considered, and tables of critical values for commonly used tests are given. The chapter also uses functionals of Wiener processes to describe the asymptotic distributions of important test statistics.
Bernt P. Stigum
- Published in print:
- 2014
- Published Online:
- September 2015
- ISBN:
- 9780262028585
- eISBN:
- 9780262323109
- Item type:
- chapter
- Publisher:
- The MIT Press
- DOI:
- 10.7551/mitpress/9780262028585.003.0008
- Subject:
- Economics and Finance, Econometrics
Chapter VIII presents a novel mathematical theory of non-linear cointegration among second-order random processes. It begins by explaining why the accepted characterization of integrated second-order ...
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Chapter VIII presents a novel mathematical theory of non-linear cointegration among second-order random processes. It begins by explaining why the accepted characterization of integrated second-order processes is inadequate for the analysis of non-linearly cointegrated economic systems, proposes alternative characterization of integrated processes, and develops novel ideas of non-linearly cointegrated second-order random processes. Thereafter, it presents a data confrontation of an economic theory about the dynamics of spot rates in foreign exchange whose variables share the behavior characteristics of the random processes in the mathematical theory. The data consist of weekly observations of a triple of exchange rates, and the empirical analysis is carried out in two ways – one by the methods of formal econometrics and another by the methods of present-day econometrics. The results of the two empirical analyses differ in interesting ways. Both agree that the behavior of the three exchange rates has the characteristics on which the mathematical theory insists, but their description of the dynamics of foreign exchange differ. Also, the present-day econometrics analysis rejects the empirical relevance of the given economic theory while the formal econometrics analysis accepts it. The acceptance of the theory carries interesting information about the dynamics of foreign exchange in social reality.Less
Chapter VIII presents a novel mathematical theory of non-linear cointegration among second-order random processes. It begins by explaining why the accepted characterization of integrated second-order processes is inadequate for the analysis of non-linearly cointegrated economic systems, proposes alternative characterization of integrated processes, and develops novel ideas of non-linearly cointegrated second-order random processes. Thereafter, it presents a data confrontation of an economic theory about the dynamics of spot rates in foreign exchange whose variables share the behavior characteristics of the random processes in the mathematical theory. The data consist of weekly observations of a triple of exchange rates, and the empirical analysis is carried out in two ways – one by the methods of formal econometrics and another by the methods of present-day econometrics. The results of the two empirical analyses differ in interesting ways. Both agree that the behavior of the three exchange rates has the characteristics on which the mathematical theory insists, but their description of the dynamics of foreign exchange differ. Also, the present-day econometrics analysis rejects the empirical relevance of the given economic theory while the formal econometrics analysis accepts it. The acceptance of the theory carries interesting information about the dynamics of foreign exchange in social reality.
