The research report titled "International Variations in IFRS Adoption and Practice" by Professor Christopher Nobes examines the differences in the adoption and practice of International Financial Reporting Standards (IFRS) across different countries. The report provides an overview of the history of IFRS adoption and the grouping of countries and accounting systems. It also discusses how countries have reacted to IFRS and the different national patterns of IFRS practice. The report highlights the persistence of national patterns in IFRS adoption and practice, and the influence of country groups and size on IFRS adoption. The report concludes that IFRS adoption and practice vary significantly across different countries, and further research is needed to understand the factors driving these variations.