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A recently published pre-print titled 'GDPR and the Lost Generation ofInnovative Apps' by Jan{\ss}en et al. observes that a third of apps on theGoogle Play Store disappeared from this app store around the introduction ofthe GDPR in May 2018. The authors deduce 'that GDPR is the cause'. The effectsof the GDPR on the app economy are an important field to study. Unfortunately,the paper currently lacks a control condition and a key variable. As a result,the effects on app exits reported in the paper are likely overestimated, as wewill discuss. We believe there are other factors which may better explain thesechanges in the Play Store aside from the GDPR.

The Cost of the GDPR for Apps? Nearly Impossible to Study without Platform Data