Military Expenditure And Granger Causality: A Critical Review
AbstractA large literature has used tests for Granger (1969) non-causality, GNC, to examine the interaction of military spending with the economy. Such tests answer a specific although quite limited question: can one reject the null hypothesis that one variable does not help predict another? If one can reject, there is said to be Granger causality, GC. Although the limitations of GNC tests are well known, they are often not emphasised in the applied literature and so may be forgotten. This paper considers the econometric and methodological issues involved and illustrates them with data for the US and other countries. There are three main issues. First, the tests may not be informative about the substantive issue, the interaction of military expenditure and the economy, since Granger causality does not correspond to the usual notion of economic causality. To determine the relationship of the two notions of causality requires an identified structural model. Second, the tests are very sensitive to specification. GNC testing is usually done in the context of a vector autoregression, VAR, and the test results are sensitive to the variables and deterministic terms included in the VAR, lag length, sample or observation window used, treatment of integration and cointegration and level of significance. Statistical criteria may not be very informative about these choices. Third, since the parameters are not structural, the test results may not be stable over different time periods or different countries.
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Bibliographic InfoArticle provided by Taylor & Francis Journals in its journal Defence and Peace Economics.
Volume (Year): 21 (2010)
Issue (Month): 5-6 ()
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Other versions of this item:
- J Paul Dunne & Ron P. Smith, 2010. "Military Expenditure and Granger Causality: A Critical Review," Working Papers 1007, Department of Accounting, Economics and Finance, Bristol Business School, University of the West of England, Bristol.
- H56 - Public Economics - - National Government Expenditures and Related Policies - - - National Security and War
- C01 - Mathematical and Quantitative Methods - - General - - - Econometrics
- O40 - Economic Development, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General
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