The J test in Example 8.2 is carried out using over 50 years of data. It is optimistic
Chapter 8, Problem 3(choose chapter or problem)
The J test in Example 8.2 is carried out using over 50 years of data. It is optimistic to hope that the underlying structure of the economy did not change in 50 years. Does the result of the test carried out in Example 8.2 persist if it is based on data only from 1980 to 2000? Repeat the computation with this subset of the data
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