IV. METHODOLOGY
In this section we briefly describe the empirical implication for a firm's optimal cash reserve in response to a change in cash flow volatility, cash holdings of financially constrained firms increase in the presence of greater cash flow volatility, while cash holdings of financially unconstrained firms should not affected by cash flow volatility. Consistent with this argument, Almeida. Campello. and Weisbach (2004) analyze the cash holding behavior of firms by splitting them into two groups, namely financially constrained and unconstrained ones, and test whether the sensitivity of cash holdings to cash flow are difference across those two samples.
Following this methodology, we have to categorize firms into constrained and unconstrained groups. There are a number of plausible measures to soiling firm into financially constrained and financially unconstrained group, hi process of choosing these variables as classification criteria, we borrow insights from prior research 011 the subject, Ozgur. Florackis and Ozkan (2006) who studies this topic in the emerging country and Han