The analysis of time series data is of vital interest to many groups, such as macroeconomists studying the behavior of national and international economies, finance economists who study the stock market, agricultural economists who want to predict supplies and demands for agricultural products. We introduced the problem of autocorrelated errors when using time series data in chapter 12. In chapter 15 we considered distributed lag models. In both of these chapters we made implicit stationary assumptions about the time series data. |
