This article studies how corporate tax hikes transmit across countries through multinationals’ internal networks of subsidiaries. We build a parsimonious multicountry model to highlight two opposing spillover effects: while tax competition between countries generates positive investment spillover, intra-firm production linkages predict negative spillover. Using subsidiary-level data and exogenous corporate tax hikes, we find that local business units cut investment by 0.5 percent for a 1 percent increase in foreign corporate tax. This result highlights the importance of production linkages in propagating foreign tax shocks, as the supply-chain-induced negative spillover dominates the positive spillover effect suggested by the conventional wisdom of tax competition.

Affiliates of multinationals borrow a considerable amount from their parent company, even when the parent is located in a high-tax country. This is at odds with standard theories of a tax-efficient capital structure. We set up a model that analyzes the functioning of the internal capital market and investigates the trade-off between tax savings and capital market frictions within the group. We test the model on data of the universe of German multinationals. The empirical analysis largely supports our model in that: (i) smaller multinationals often rely on parental debt financing; (ii) larger multinationals are more likely to use internal banks; (iii) parental debt and external debt are substitutes and the mix depends on the relative cost of raising capital through the parent and the affiliates; (iv) local and within-group tax incentives play an important role in determining all three types of debt.

This study examines the flexibility of multinational firms to adjust their income-shifting strategies—whether using transfer pricing or internal debt—during the tax year to react to affiliates' operating losses. We develop the concept that under flexibility, multinationals can adjust their inter-affiliate payments ex post (i.e., after financial outcomes are revealed, but before the end of the tax year) to minimize worldwide tax payments. Without flexibility, multinationals must commit to their affiliates' income-shifting strategies ex ante (i.e., before financial outcomes are revealed). Our central prediction is that under ex post income shifting, loss affiliates report lower transfer prices and internal leverage than profitable affiliates; under ex ante income shifting, affiliates report the same transfer prices and internal capital structure, regardless of making losses. Using novel data on direct transfer payments and internal debt of Norwegian affiliates, we find empirical evidence that transfer pricing, particularly related to user fees, but not internal debt, provides flexibility to adjust income shifting ex post. In additional tests, we confirm that our results reflect flexibility rather than loss affiliates' poor performance. Our study should interest tax policymakers and researchers by identifying how various mechanisms allow multinational firms to shift income when they face losses.