精选优质文档-倾情为你奉上高级计量经济学考试一、单选题（25 *2分）1. Which of the following correctly identifies a difference between cross-sectional data and time series data? a. Cross-sectional data is based on temporal ordering, whereas time series data is not. b. Time series data is based on temporal ordering, whereas cross sectional data is not. c. Cross-sectional data consists of only qualitative variables, whereas time series data consists of only quantitative variables. d. Time series data consists o
