| Summary: | 碩士 === 朝陽科技大學 === 會計所 === 95 === The implementation of a unified tax system in Taiwan in 1998 was mainly focused on manufacturing units. However, the introduction of this system is also likely to have affected other types of business units. While the traditional literature has placed much emphasis on the former, its influence on the latter, even indirectly, has been lacking. The main purpose of this paper is thus to examine the effect of tax unification on the operational performance of Taiwan’s banks following its implementation. The period covered by this study extends from 1996 to the year 2000, and 33 domestic banks that are listed on either the local stock or OTC markets make up the sample. The discussion of the operational performance of these banks involves a three-stage process. The first stage involves first of all using data envelopment analysis to calculate each bank’s efficiency value to evaluate each bank’s operational performance. In the second stage, Malmquist productivity change indices are adopted to engage in cross-period analysis for each bank. Finally, the Tobit regression model is employed in order to analyze the relationship between the exogenous variables and efficiency. The main findings are as follows: (1) The measures adopted by each bank in response to the implementation of the unified tax system differ, to the extent that their operational performance varies as a result. However, when the respective performances of the banks are considered as a whole, the implementation of tax unification is indeed found to affect the operational performance of Taiwan’s banks. (2) In terms of their policies and controls over resources, the old banks are seen to perform better than new banks following the implementation of a unified tax system. (3) From the Tobit regression analysis, it is discovered that the effective tax rate has a negative influence on the efficiency values and pure efficiency values, whereas the number of banks has a negative influence on the efficiency values and scale efficiency values, but has a positive influence on pure efficiency values. Capital adequacy ratios have a positive influence on efficiency values and pure efficiency values. Asia Financial Crisis have a positive influence on efficiency values and scale efficiency values.
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