Decision Point: Choosing Your Secondary Sources Having decided what you want to research, you now must decide what sources to use to gather your data. The following secondary resources are available. Which will you choose to use first? Bear in mind that using in-house databases costs very little, whereas using a commercial database will incur considerable expenses. Select an option from the choices below and click Submit. i 0 Use in-house year purchase history data from the past 10 years, which contains consumer profiles. Don't use any secondary sources-you prefer to use primary sources that target exactly the data you want. Use an online commercial database that contains 15 years of eSports industry sales analysis and market profiles.