Karlılık açısından dezenflasyonun bankalar üzerindeki etkileri: Türk ticari bankaları için parametrik olmayan bir çalışma

There exist some Data Envelopment Analysis (DEA) studies on the Turkish banking system in the literature. They mostly evaluate the effects of economic crises on the whole banking industry. However, none of them directly inquire the differences between the high inflation period and the low inflation period. Since inflation dropped drastically after the 2001 liquidity crisis, Turkish banking sector is a very prominent setting to observe whether high inflation or disinflation period is more profitable for commercial banks. Between 1998 and 2003 inflation was high and Turkish banks worked with low loan ratios and they mostly fed government deficits via government bonds. On the contrary, as the inflation dropped, the Turkish banks increased their total loans per total assets ratios. Based on the information above, should the Turkish banking sector be more profitable with higher rates of inflation?In this study, we aim to investigate which period is more profitable for commercial banks. For this purpose, we employ Slacks Based Measure of DEA and Malmquist Productivity Index to compare the two periods (1998-2003 and 2004-2008). In addition, we evaluate banks? efficiencies with respect to correlations with bank size, ROA, ROE, age of bank, ownership, loan ratio, capital adequacy ratio, etc. and we come up with policy recommendations depending on the correlations.Keywords: banking sector, profitability, Data Envelopment Analysis, Slacks Based Measure, Malmquist Productivity Index