Abstract
Using a simple asymmetric capital-tax competition model where the allocation of mobile capital is distorted in non-cooperative equilibrium, this paper analyzes the welfare impact of regional tax coordination on a range of possible tax rates (a combination of maximum and minimum capital taxes made by a subset of regions). Under the assumption that the ownership of immobile factors (e.g., business land) is diversified across regions, a new possibility of beneficial coordination arises which has not been identified before: tax-range coordination “among capital-exporting regions” or “among capital-importing regions” may improve the welfare of all regions. This is in contrast to the case without cross-ownership where both capital-exporting and capital-importing regions must be involved in tax-range coordination in order to achieve a Pareto improvement.
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Notes
Examples of the related studies are Richter and Wellisch (1996), Wildasin and Wilson (1998), Lee (2003a, b, 2005), Braid (2005) and Kächelein (2012). These papers investigate how cross-ownership of business land affects non-cooperative tax, expenditure and environmental policies. In a closely related paper, Huizinga and Nielsen (1997) analyze non-cooperative capital taxation when local firms are partially owned by non-local residents. In contrast to the race-to-the-bottom caused by tax competition, cross-ownership is ordinarily regarded as a source of tax exporting that creates a tendency towards inefficiently high tax rates.
Among the related studies of tax coordination, Sørensen (2004) is the sole paper of which I am aware in which cross-ownership is allowed for. However, his analyses focus on the welfare impact of a minimum capital tax. Moreover, it is difficult to grasp the implication of cross-ownership from his complex numerical analyses.
See OECD (2003) for regional coordination on trade and other policies.
In the United States, only 16 states are the compact members of the Mutistate Tax Commission that promotes uniformity and compatibility of state tax systems (http://www.mtc.gov/The-Commission). In EU as a confederation, regional policy coordination is authorized through the framework of enhanced cooperation (https://ec.europa.eu/commission/sites/beta-political/files/enhanced-cooperation-factsheet-tallinn_en.pdf).
Sect. 5 refers to regional asymmetries other than land endowment (capital endowment, population and cross-ownership). It will be argued that the assumption of heterogenous land endowment is crucial to the present analysis of regional tax-range coordination.
See, for example, Peralta and van Ypersele (2006), Bucovetsky (2009), Itaya et al. (2016) and Ogawa et al. (2016). As will be shown in (7) and (8), a nice feature of quadratic production functions is that the regional capital demand and the net capital return are expressed as linear functions of tax rates. Non-linearity will make the analysis of asymmetric tax competition almost intractable.
This does not necessarily exclude the possibility that the equilibrium net capital return is zero; see Bucovetsky (2009). The present analysis focuses only on the case where ρ > 0.
This is reminiscent of the distortion caused by tax exporting (excessive taxation); see footnote 3.
See Sect. 5 for further arguments.
Therefore, one can interpret that the S set consists of regions i and j only.
This argument holds regardless of whether the cause of strategic capital taxation is heterogenous capital endowment (as in Peralta and van Ypersele 2006) or heterogenous land endowment. Indeed, my explanation on the first term of (20a, 20b) in this paragraph is based on the explanation of Peralta and van Ypersele (2006) on their Proposition 2.
Although capital-exporting regions may choose negative tax rates in the present model, the impact of negative tax rates had been already incorporated into the Peralta-Ypersele effect. Thus, the cross-ownership effect must be interpreted as if the tax rates were positive.
Note that qi or qj in A must be also replaced with qh: as for \( \partial Y_{h} /\partial t_{j} \), \( A = \chi - \left( {q_{h} + q_{j} } \right) /2 \); as for \( - \left( {\partial Y_{h} /\partial t_{j} } \right) \), \( A = \chi - \left( {q_{h} + q_{i} } \right)/2 \).
This argument is consistent with the previous studies of tax-rate coordination such as Itaya et al. (2008): in their model, regional asymmetry enhances the sustainability of tax-rate coordination in repeated games since the efficiency gain from correcting inefficient capital allocations is large.
The formal analyses of these regional asymmetries are available upon request.
It is well-known that inefficient public policies under asymmetric population arise because each region faces different magnitude of the elasticity of capital investment with respect to the tax rate; see Bucovetsky (2009) and references therein. Similarly, asymmetric cross-ownership gives competing regions different magnitude of tax-exporting incentive, which has little to do with the incentive for strategic capital taxation. With respect to this point, note that inefficient public policies under asymmetric cross-ownership have not been studied enough. The papers referred to in footnote 3 assume identical regions or focus on the policy choices made by a small open region. Although Sørensen’s (2004) simulation analyses include asymmetric cross-ownership, its normative implication is not clear.
The formal analysis of the minimum tax system is available upon request.
That is, there is no possibility that the minimum tax system made by capital-importing regions only raises all regions’ welfare.
The previous studies of endogenous tax coordination have been confined to the case of tax-rate coordination (cf. Burbidge et al. 1997; Bucovetsky 2009). Assuming that a common tax rate is set so as to maximize the sum of coordinating regions’ welfare, these studies show that the most efficient outcome in which all regions join tax-rate coordination does not necessarily appear as an equilibrium situation.
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Acknowledgements
I would like to thank Ryo Itoh, Yukihiro Nishimura, Hikaru, Ogawa, Yasuhiro Sato and Masayoshi Hayashi for very helpful comments. The comments from an anonymous referee were very helpful. This work was supported by JSPS KAKENHI (Grant Number JS18K01668).
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Appendix
Appendix
Lemmas 1 and 2. Note from (7) that \( k_{i} > E \) if and only if \( \tau - t_{i} + \gamma \left( {q_{i} - \chi } \right) > 0 \) and that \( k_{i} > k_{j} \) if and only if \( t_{j} - t_{i} + \gamma \left( {q_{i} - q_{j} } \right) > 0 \). Equations (13) and (14) imply that
where \( Z=\gamma \left( {\frac{N - 1}{N} - \frac{N - 2}{N - 1}\mu } \right) > 0 \). (A1) and (A2) prove (15) in Lemma 1. From (A2), the second part of Lemma 2 can be confirmed since \( t_{i} - t_{j} = \left( {\gamma - Z} \right)\left( {q_{i} - q_{j} } \right) \) and \( \gamma - {\rm Z} = \gamma \left( {\frac{1}{N} + \frac{N - 2}{N - 1}\mu } \right). \)
Derivation of (20a, 20b). Differentiating (1) and applying (10) and (11) to the result gives the external impact of tax policy.
In non-cooperative equilibrium, (12) must hold. This equation can be rewritten as
Substituting (A4) into (A3) and noting from (10) that \( \partial k_{i} /\partial t_{i} = \partial k_{j} /\partial t_{j} \), \( \partial k_{i} /\partial t_{j} = \partial k_{j} /\partial t_{i} \) and \( \partial k_{h} /\partial t_{j} = \partial k_{h} /\partial t_{i} \), it can be shown that
Since (10) implies that \( \partial k_{i} /\partial t_{j} - \partial k_{i} /\partial t_{i} = 1/\delta \), (A5) is reduced to
Substituting (13) and (14) into (A6),
or, equivalently,
The same procedure yields (20b).
Note that (A7) corresponds to the decomposition of the welfare impact of the present tax-range change that is argued in Sect. 4. The sum of the first and second terms of (A7) is equal to \( t_{i} /\delta \). The first term of (A7) and (A8) represents the Peralta–Ypersele effect. The second and third terms of (A7), whose sum is equal to the second term of (A8), constitute the cross-ownership effect: the second term of (A7) captures the impact of cross-ownership on the tax revenue while the third term of (A7) stands for the impact on rent flows between constrained regions.
Consider that \( \chi > q_{i} > q_{j} \) in which case (28a) shows that \( A > 0 \), \( 0 < \varepsilon_{i} < 1 \) and \( 1 < \varepsilon_{j} < 2 \). In this case, it can be confirmed from (24a, 24b) that
What (A9a, A9b) show is that the welfare of regions i and j is improved if
These conditions, together with (A9c), prove that \( \partial Y_{i} /\partial t_{j} > 0 \) and \( - \left( {\partial Y_{j} /\partial t_{i} } \right) > 0 \) if (29a) holds. Using (28b), the same procedure yields (29b).
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Matsumoto, M. Production inefficiency, cross-ownership and regional tax-range coordination. Econ Gov 20, 371–388 (2019). https://doi.org/10.1007/s10101-019-00229-z
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DOI: https://doi.org/10.1007/s10101-019-00229-z