A number of recent articles argue that the 'problem of Bachet' - the problem of finding the most efficient set of weights - can shed light on the problem of finding the optimal denominational structure of a series of coins and bank notes. This note argues that the two problems differ in nature,...

Fuentelsaz, Garrido and Maicas (2015) propose an “improved” measure of network value for the mobile telecommunications industry. Unfortunately, their measure has multiple issues. For one, it is biased against networks that are small and/or active in small markets. Also, it cannot adequately...

We use logit analysis to exploit a self-collected dataset on the payment and delivery options offered by the vast majority of B2C websites in five Central Asian transition economies. Specifically, we conduct a supply-side test of (elements of) the Transaction Context Model, which highlights the...

Earlier I have argued in favour of explicit cost-based pricing of payment instruments. This article analyses new cost estimates for the Netherlands, and provides an overview of positions recently taken by important actors such as central banks and the European Commission. The new cost estimates...

On December 31st the high-profile test of stored-value cards in Manhattan's Upper West Side, the most important U.S. pilot to date, drew to a close after a 15-month run. The results were disappointing. This paper describes the organization of the trial, analyzes the results, and rounds up...

This paper explores how households organize the process of e-grocery buying in a click-and-collect context, down to the level of the two main subtasks: the online ordering and the picking-up. Self-collected survey data on 112 users of Belgian click-and-collect services first provide a...

This article reports the first publicly available results of the newly created Digital Payment Barometer for Belgium. As in other countries, the COVID-19 pandemic triggered a shift towards contactless and, to a lesser extent, mobile payments at the point-of-sale. Strikingly, the biggest jumps in...

In order to determine how sustainable online grocery shopping is as a practice, it is crucial to have an in-depth understanding of its drivers. This paper therefore validates the Unified Theory of Acceptance and Use of Technology (UTAUT2) in the context of e-grocery and enriches it with five...

Agarwal et al. (2019) analyze the impact of the introduction of QR codes for mobile payments in Singapore. They find that this not only resulted in a significant increase in the use of mobile wallets, but that there was also a positive spillover effect on debit and credit card payments. This...

This article presents and discusses selected results of the newly created Digital Payment Barometer, an annual nationally representative survey among more than 1,100 Belgians. As in other countries, in Belgium too the COVID 19 pandemic triggered a shift towards contactless payments at the...