← 1. While the DSTRI provides an aggregate measure of regulatory measures to trade in digitally enabled services, this analysis focuses on its individual policy subdimensions to better identify which specific regulatory areas are most strongly associated with the DIPs diffusion across the three sectors studied. Given that the DSTRI is a composite index, analysing its policy area separately allows for more granular insights into the relative impact of restrictions related to IPR, payment systems, infrastructure, and other restrictions. For reference, regression results using the overall DSTRI score are also provided in Annex C.
← 2. Two distinct model specifications were estimated for the foreign firm traffic share: one including a control for domestic market competition and one without. The proxy for domestic competition is platform traffic from domestically headquartered firms. Regressions on structural characteristics suggest that this variable is significantly and negatively associated with foreign platform traffic, indicating its relevance as a control.
However, the inclusion of domestic traffic may introduce a bias. On one hand, domestic platform traffic is likely influenced by the same structural characteristics that drive online platform diffusion. Moreover, restrictions to digital trade in services may affect both foreign and domestic platforms. As such, controlling for domestic traffic may inadvertently capture part of the policy effect, leading to a potential downward bias in the estimated association between digital trade restrictions and foreign platform traffic. That is, the true effect of restrictive policies could be underestimated when the domestic competition proxy is included. Conversely, excluding this control could result in an upward omitted variable bias, since the model would not account for the market dynamics between foreign and domestic platforms. In this case, the estimated coefficients might overstate the impact of restrictions if domestic competition serves as a partial substitute for foreign entry. As a result, the estimates from these two specifications can be understood as providing lower and upper bounds for the true association, respectively.
To account for this trade-off, both specifications were estimated. Results are broadly consistent across models, though some differences emerge. Table A.B.2 shows that the model including domestic competition reveals stronger and statistically significant negative associations between restrictions to payment systems and other regulatory measures and traffic from foreign-headquartered pure X2C marketplaces, as well as between restrictions on IPR protection and enforcement and foreign traffic in travel and accommodation platforms. Notably, the negative association between restrictions on IPR protection and enforcement and foreign presence in ride-hailing and carpooling platforms is weaker and less significant in the model that omits the domestic traffic control. This result is intuitive, given the near-complete dominance of foreign platforms in this sector – like Uber, Bolt and Lyft – across most countries, reducing the relevance of the domestic competition proxy.
Given the potential for upward bias when omitting the domestic competition control, the results presented in the figures (e.g., bar plots in the report) correspond to the specification that includes this control. This approach aims to provide more conservative estimates of the association between domestic policies restricting trade in digitally enabled services and foreign DIPs diffusion.
← 3. The coefficients displayed in the charts are the direct outputs from log-linear regressions, where the dependent variable – such as total traffic or foreign traffic share – is expressed in natural logarithms. These coefficients indicate the expected change in the log of the outcome variable associated with a one-unit increase in the relevant policy score. However, they do not directly correspond to percentage changes in the original scale of the diffusion indicator.
To translate the estimated coefficients into more intuitive percentage changes, we apply the following exact formula:
where is the estimated coefficient and is the size of the change in the policy variable.
For example, consider the strong negative association observed between restrictions on IPR protection and enforcement and total traffic in the travel and accommodation booking sector. The chart shows an estimated coefficient of -8, which reflects the effect of a full one-unit decrease in the score related to restriction on IPR protection and enforcement – a very large and likely unrealistic policy shift. To better reflect a more plausible reform, we consider a smaller change: a 0.01-point decrease in the policy score. Applying the formula yields:
This means that a 0.01-point reduction in digital trade restrictions on IPR protection and enforcement is associated with an 8.4% increase in total traffic in the accommodation booking sector.
All percentage effects discussed in the main text are derived systematically using this exact method, allowing for consistent and policy-relevant interpretation of the results.
← 4. The observed associations between digitally enabled services trade restrictions and platform diffusion are broadly consistent with expectations: lower regulatory measures tend to support greater traffic and higher foreign participation, particularly for pure DIPs. Sector-specific competition dynamics discussed in Box 3 provide additional context. In ride-hailing, for example, increasing competition over the past decade has likely amplified the impact of moderate regulatory reforms, while in more concentrated markets such as travel and accommodation booking, established platforms’ structural advantages may moderate these effects. This perspective helps explain instances where some restrictions appear positively associated with platform activity, albeit often insignificantly, potentially reflecting the interplay of market structure and incumbent platform strategies.
Other mechanisms beyond regulatory policy likely contribute to platform diffusion patterns. Network effects, platform heterogeneity, and differences in business models shape responsiveness to restrictions. Pure DIPs, which rely on digital-only channels, are more sensitive to local presence requirements than hybrid platforms with physical infrastructure. Similarly, platform features such as capital intensity, review systems, digital versus physical service delivery, internationalisation, and sectoral diversification influence uptake and competitive dynamics (Costa et al., 2021[5]). While these factors are not fully captured in the current macro-level model, the competition dynamics lens offers a plausible framework for interpreting their likely influence.
Future research could extend the analysis by integrating alternative measures of platform activity, exploring joint policy effects, and examining heterogeneity across platform characteristics and sectors. Such work would provide a more granular understanding of the channels through which restrictions to digitally enabled services shape competition, diffusion, and foreign participation.
← 5. Individual STRI scores for specific sectors, like the STRI for Computer Services, may be better adapted to the sectoral realities of DIPs, rather than the more cross-cutting nature of the DSTRI.
← 6. The charts display estimated coefficients from equation (1) in Annex A. Each DSTRI policy area is tested individually, controlling systematically for structural factors influencing platform diffusion. For significant results, the dark blue bars represent the marginal effect on the respective diffusion indicator (Total traffic, Traffic from foreign firms, or Share of traffic from foreign firms) for pure DIPs in the ride-hailing and carpooling sector, associated with a one-unit increase in the DSTRI policy score. Black error bars denote clustered standard errors at the country level. Significance levels for rejecting the null hypothesis (no significant association between restriction and diffusion indicator) are indicated as follows: *** p < 0.01 (1%), ** p < 0.05 (5%), * p < 0.10 (10%). For a detailed explanation of the full methodology and empirical specifications, refer to Annex A. For full regression results, see Annex C.