【摘要】Data is the material when people do economic statistics analysis.Because the data will directly affect the research result,the quality of data is very important.Establishing data model and collecting data should be both under the guidance of the economic theory and statistic theory.Panel sample is one kind of research methods in analyzing social and economic problems,for it can joint cross section data and time series data,the research result it provides is often very effective.People should pay attention to it.