Maps are important in many areas of linguistics, especially dialectology, sociolinguistics, typology, and historical linguistics, including for visualizing regional patterns in the distribution of linguistic features and varieties of language. In this hands-on tutorial, we introduce map making for linguistics using R and the popular package ggplot2. We walk the reader through the process of making maps using both typological data, based on the World Atlas of Language Structures, and dialect data, based on large corpora of language data collected from German and American social media platforms. This tutorial is intended to be of use to anyone interested in making maps of linguistic data, and more widely to anyone wanting to learn about mapping in R.

We identify a new mechanism of opportunistic insider trading linked to attention-driven mispricing. Insiders are more likely to sell their company’s stock during periods of heightened retail attention and more inclined to buy when attention diminishes. The results are particularly pronounced for lottery-type stocks and firms with substantial retail ownership. We demonstrate that our findings—which relate to indicators of mispricing, retail order imbalances, and Robinhood herding episodes—extend to seasoned equity issuances and cannot be solely explained by firm fundamentals. Attention-based insider trading is less likely to result in SEC enforcement actions and persists across different regulatory regimes.

A complete description of all possible multiplicative groups of finite skew left braces whose additive group has trivial centre is given. As a consequence, some earlier results of Tsang can be improved and an answer to an open question set by Tsang at Ischia Group Theory 2024 Conference is provided.

This short report discusses the resources to be found in the Railway Archive in Sekondi-Takoradi, Ghana. This report is also the result of various exploratory missions, as part of a cooperative effort between the Ghana Railway Company, the Institute of African Studies of the University of Ghana, and the International Institute of Social History, the Netherlands. The archive under consideration is classified as an institutional archive which provides unique insights into the social and labour history of Ghana– then Gold Coast– with some connections to West Africa and Great Britain. The archives provide additional material to the resources in the national archives in Ghana, best known as the Public Records and Archives Administration Department (PRAAD).

The online dating application has in recent years become a major avenue for meeting potential partners. However, while the digital public sphere has gained the attention of political philosophers, a systematic normative evaluation of issues arising in the “digital sexual sphere” is lacking. I provide a philosophical framework for assessing the conduct of dating app corporations, capturing both the motivations of users, and the reason why they find usage unsatisfying. Identifying dating apps as agents intervening in a social institution necessary for the reproduction of society, with immense power over people’s lives, I ask if they exercise their power in line with individuals’ interests. Acknowledging that people have claims to noninterference, equal standing, and choice improvement relating to intimacy, I find that the traditional, nondigital, sexual sphere poses problems to their realisation, especially for sexual minorities. In this context, apps’ potential for justice in the sexual sphere is immense but unfulfilled.

We document spillover effects of government policies promoting capital investment on household financial choices and wealth accumulation. Using individual-level data on employment outcomes and household balance sheets, we find that increase in accelerated depreciation limits increases the layoff probability of routine workers and reduces their stock share of liquid wealth relative to non-routine workers. Background risk due to the policy is mitigated when workers have access to generous unemployment insurance benefits. Finally, we show that such portfolio rebalancing adversely impacts investment returns and the wealth accumulation of routine workers.