Having thought
about who or what you are studying, the next step is to think about
what you are studying about your observations (constructs and variables).
Recall that in the previous
chapter I defined a construct as
the underlying concept that you are trying to measure and a variable as the actual measurement that gives you data. These are not identical because you can use different measures (variables) of the same concept (construct). For instance, I might want to measure the construct ”profitability of businesses,” but I might generate very different variables reflecting this construct depending on whether I get data on their share price data or internal ...