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The economic effects of EU-reforms in corporate income tax systems

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mobile also between Europe and the rest <strong>of</strong> the world. In that case, also <strong>in</strong>vestment from Japan<br />

and the US can respond to the average <strong>corporate</strong> <strong>tax</strong> rate adopted <strong>in</strong> European countries.<br />

2.2 Calibration <strong>of</strong> CORTAX<br />

CORTAX is calibrated for the 27 Member States <strong>of</strong> the European Union plus the US and Japan.<br />

We use data for 2005 to replicate national aggregates from national accounts data, such as<br />

consumption shares, labour-<strong>in</strong>come shares, the average number <strong>of</strong> hours worked and foreign<br />

direct <strong>in</strong>vestment. Moreover, we make extensive use <strong>of</strong> <strong>in</strong>formation from the ORBIS database.<br />

A full description <strong>of</strong> the calibration process is given <strong>in</strong> Van der Horst et al. (2008). Here, we<br />

concentrate on parts <strong>of</strong> the calibration that are crucial for the outcomes <strong>of</strong> <strong>corporate</strong> <strong>tax</strong> <strong>reforms</strong>.<br />

2.2.1 <strong>The</strong> ORBIS database<br />

<strong>The</strong> ma<strong>in</strong> source <strong>of</strong> micro<strong>economic</strong> data used <strong>in</strong> the calibration <strong>of</strong> CORTAX is the ORBIS<br />

database, a comprehensive set <strong>of</strong> data <strong>of</strong> companies around the world. In the update currently<br />

used, it conta<strong>in</strong>s <strong>in</strong>formation on over 9 million companies. This large number is possible<br />

because the database conta<strong>in</strong>s unconsolidated reports <strong>of</strong> companies with<strong>in</strong> <strong>corporate</strong> groups, a<br />

fact which we exploit <strong>in</strong> our analysis.<br />

ORBIS is provided by the Bureau van Dijk, which standardizes the balance sheet<br />

<strong>in</strong>formation collected from over 40 different <strong>in</strong>formation providers. In addition to balance sheet<br />

and pr<strong>of</strong>it and loss account items, the database also <strong>in</strong>cludes ownership <strong>in</strong>formation. <strong>The</strong><br />

<strong>in</strong>formation on the ownership structure <strong>in</strong>cludes the name and number <strong>of</strong> shareholders, their<br />

country <strong>of</strong> residence and the percentage <strong>of</strong> ownership. <strong>The</strong> same <strong>in</strong>formation is available for the<br />

subsidiaries.<br />

<strong>The</strong> balance sheet data <strong>in</strong>cludes <strong>in</strong>formation about the assets structure, broken down <strong>in</strong>to<br />

fixed, tangible and <strong>in</strong>tangible assets, the current assets, stocks, debtors and cash and about the<br />

liabilities divided <strong>in</strong>to current and non-current liabilities. <strong>The</strong> pr<strong>of</strong>it and loss accounts <strong>in</strong>ter alia<br />

provide <strong>in</strong>formation about operat<strong>in</strong>g revenues, the cost <strong>of</strong> goods sold, gross pr<strong>of</strong>its, earn<strong>in</strong>gs<br />

before <strong>in</strong>terest and <strong>tax</strong>es, f<strong>in</strong>ancial revenues and expenses, <strong>tax</strong>ation, pr<strong>of</strong>it and loss before and<br />

after <strong>tax</strong>. Additionally, memo l<strong>in</strong>es like the number and cost <strong>of</strong> employees, <strong>in</strong>terest payments<br />

and depreciation are available. Further data available for the companies <strong>in</strong>cludes their date <strong>of</strong><br />

<strong>in</strong>corporation, the legal form, their NACE (4 digits) classification and their activity status.<br />

<strong>The</strong> ORBIS update <strong>of</strong> October 2006 conta<strong>in</strong>s data for the world top 9 million firms from<br />

1993 to 2005. <strong>The</strong> criteria for select<strong>in</strong>g the top 9 million companies are based on turnover,<br />

number <strong>of</strong> employees and assets. For computational reasons we further restrict the sample to<br />

choice consider the statutory <strong>tax</strong> <strong>in</strong> a country relative to the European average. Only if a country reduces its <strong>tax</strong> rate below<br />

the European average will it become more attractive as a location for pr<strong>of</strong>itable <strong>in</strong>vestment projects.<br />

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