A revised theory of contestable markets : applied on the German telecommunication sector
Christian Growitsch, Thomas Wein
Externe Publikationen,
Nr. 275,
2002
Abstract
Despite the scepticism raised by the German Monopoly Commission our analysis shows that the revised theory of contestable markets can be applied to the telecommunications market better than expected. The original contestable market theory implied three assumptions necessary to be satisfied to establish potential competition: Free market entry, market exit is possible without any costs, and the price adjustment lag exceeds the entry lag. Our analysis shows that if the incumbent reduces its prices slowly (high adjustment lag) and the market entry can be performed quickly (low entry lag), a new competitor will be able to earn back sunk costs. Therefore it is not necessary that all three conditions are satisfied for potential competition to exist. We applied the ‘revised’ contestable market theory to the German telecommunication market and have been able to clearly identify the value added stages in which regulation is required. Under the present conditions local loops - which can be determined as natural monopolies - are not contestable due to sunk costs, high entry lags expected and a probable short price adjustment lag. Local loops can be identified as monopolistic bottlenecks therefore. Regional and local connection networks should also be regulated because a high entry lag and a low price adjustment lag have to be expected as well as current competition does not exist today. The national connection network shows current competition between several network providers; hence regulation can be abolished in this field. Assumed that network access is regulated, services can be supplied by several competing firms.
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Local Taxes and Capital Structure Choice
Reint E. Gropp
International Tax and Public Finance,
Nr. 1,
2002
Abstract
This paper investigates the question of taxation and capital structure choice in Germany. Germany represents an excellent case study for investigating the question of whether and to what extent taxes influence the debt-equity decision of firms, because the relative tax burdens on debt and equity vary greatly across communities. German communities levy local taxes on profits and long-term debt payments in addition to personal and corporate taxes on the federal level. A stylized model is presented incorporating these taxes. The model shows that local taxes create substantial incentives for firms to use debt financing. Furthermore, the paper empirically investigates the effect of local business taxes on the share of debt used to finance incremental investments by German firms. I find that local taxes significantly influence the capital structure choice of firms, controlling for a large number of other factors. In an extensive sensitivity analysis the tax effect are found to be robust across several different specifications.
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The Effect of Expected Effective Corporate Tax Rates on Incremental Financing Decisions
Reint E. Gropp
IMF Staff Papers,
Nr. 4,
1997
Abstract
This paper uses U.S. panel data to estimate the effect of expected effective corporate tax rates on the amount of debt issued by firms. The paper directly estimates expected corporate tax rates using rational expectations. The estimated measures of expected effective tax rates of firms are related to a continuous measure of incremental debt financing. The paper finds that expected effective tax rates are significantly and positively related to a higher level of debt financing. Simulations suggest that debt issues would double if firms were unable to shield profits and actually faced the statutory tax rate.
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