Between 2012 and 2024, Poland-once a laggard in cashless payments among EU countries-underwent a profound transformation. The per capita number of cashless transactions at physical points of sale increased more than eightfold, rising from approximately 30 to over 250 per year, surpassing the EU...

Electric mobility and renewable energy play key roles in the global energy transition. In this context, vehicle- to-grid technology, which enables bidirectional energy ŕow between electric vehicles and the grid, could make electric vehicles usable as energy storage units, thus supporting grid...

Hidden “junk” fees have the potential to distort competition, creating high costs to consumers. However, regulating them can lead to adverse effects, especially in complex markets with intermediaries where they are most prevalent. To explore the equilibrium adjustments of regulating hidden...

Although there is ample empirical evidence that congestion charges can effectively reduce traffic congestion and its detrimental effects, this instrument has only been implemented in a handful European cities. On the basis of a randomized information experiment that was embedded in a survey...

Because auditors have access to corporate information, a firm's decision to protect material trade secrets should, in principle, not influence audit effort. We analyze the effects of trade secrecy protection on the audit fees, documenting that firms with redacted information pay significantly...

This technical background paper evaluates the progress of African nations in establishing effective fiscal frameworks for digital infrastructure across the continent. Through a comprehensive comparative analysis of legislative, tax, and regulatory policies in over 20 African countries, the...

This paper investigates the impact of price transparency on equilibrium prices and fees by considering a policy change implemented by Airbnb that affected the transparency of cleaning fees for IP addresses from the European Union (EU). Using a difference-in-differences approach, we find a...

One of the promising opportunities offered by AI to support the decarbonization of electricity grids is to align demand with low-carbon supply. We evaluated the effects of one of the world's largest AI managed EV charging tariffs (a retail electricity pricing plan) using a large-scale natural...

Domestic abuse is a pervasive global problem. Here we analyze two approaches to reducing violent DA recidivism. One involves charging the perpetrator with a crime; the other provides protective services to the victim on the basis of a formal risk assessment carried out by the police. We use...

The aim of this contribution is to confirm or dispute the hypothesis that the new system of charges for municipal waste management in the Czech Republic is suitable for both taxpayers and municipalities. To achieve this aim, the article critically describes the old and new methods of communal...

The active mutual fund equilibrium model developed by Berk and Green (2004) predicts that fees should not matter for investors’ mutual fund choices. We examine how fees influence demand for active mutual funds by analyzing time variation in funds’ fees. Since investors should not pay "alpha...

Royalty payment has been under heated debate in both the traditional art market and the newly emerged non-fungible tokens (NFTs) markets. In this paper, we investigate the role of royalty payments in the trading market with creators and buyers and explore how NFT platforms should design royalty...