Empirical analysis of daily cash flow time series and its implications for forecasting

Francisco Salas-Molina, Juan A. Rodr\'iguez-Aguilar, Joan Serr\`a, Montserrat Guillen and Francisco J. Martin

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Abstract: Cash managers make daily decisions based on predicted monetary inflows from debtors and outflows to creditors. Usual assumptions on the statistical properties of daily net cash flow include normality, absence of correlation and stationarity. We provide a comprehensive study based on a real-world cash flow data set from small and medium companies, which is the most common type of companies in Europe. We also propose a new cross-validated test for time-series non-linearity showing that: (i) the usual assumption of normality, absence of correlation and stationarity hardly appear; (ii) non-linearity is often relevant for forecasting; and (iii) typical data transformations have little impact on linearity and normality. Our results provide a forecasting strategy for cash flow management which performs better than classical methods. This evidence may lead to consider a more data-driven approach such as time-series forecasting in an attempt to provide cash managers with expert systems in cash management.

Date: 2016-11, Revised 2017-06
New Economics Papers: this item is included in nep-ecm and nep-for
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