The dissertation by Sebastian Steffen (2022) addresses the economics of information technology, human capital, and the future of work through three essays. The first essay analyzes occupational skill demands and skill return variability across industries using data from over 200 million online job postings, identifying reskilling opportunities for workers. The subsequent essays explore the impact of remote work feasibility on firm performance during the COVID-19 pandemic and investigate firms' hiring responses to data breaches, emphasizing the importance of strategic labor management and substantive cybersecurity investments.