Since most data for a given market study is not readily available, analysts must be creative in their use of data that they are able to obtain. The primary source for detailed household demographic information is not available publicly. the U. S. Bureau of the Census. the local tax collector's office. the Federal Reserve.

As explained below.

Explanation:

Since most of the data is available these days on internet companies can keep track of the customers' buying behavior, taste, and preferences, etc. Thus the most primary data is collected by survey methods like the telephone conversation or a mailed in-depth interview. Due to the lesser availability of time, these data are unable to get completed and hence the researcher tends to make his analysis and interpretation of household the matter which is not available publicly so he has to manipulate the data by using the data from the past event and analyzing the trends in the market like the federal office or the administrative records. As most of the primary data does not exist the use of secondary data can be taken and detailed information can be taken from these in the form of samples.