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Statistical similarities among the latest long expansion in the U.S. and some other past expansions, in particular that of the 1960s, are examined. Corresponding to the definition of statistical similarity, a test based on the covariance matrices of business cycle component variables for the different expansions is proposed. Among available tests, the test based on partial common principal component analysis is argued to be most appropriate. The test is applied to the components of both GDP and the composite coincident index. As a result, the 1990s expansion is concluded to be statistically similar to that of the 1960s.

EXAMINING SIMILARITIES AMONG PHASES OF BUSINESS CYCLES : IS THE 1990S US EXPANSION SIMILAR TO THE 1960S'?