This application seeks continued financial support from the ESRC for LIS, a cross-national data archive and research institute. LIS is a data infrastructure of income and wealth data whose primary purpose is to enable cross-national, interdisciplinary primary research into socio-economic outcomes and their determinants. Whilst LIS is physically located in Luxembourg, users of the LIS microdata come from about 100 countries including the UK. The work of acquiring and harmonising diverse datasets from multiple countries is labour intensive; by centralising this task, LIS saves time for researchers carrying out comparative analyses, avoiding the repetition of these tasks every time a scholar starts a project; in addition, thanks to its expertise over many years, LIS can ensure users the best comparability of the data. In order to avoid having to charge individual user fees, LIS is seeking financial support to be able to continue providing researchers with access to high-quality data. This application seeks support from ESRC to help cover LIS' basic operating costs, which primarily consists of staff salaries and computer equipment. LIS contains the Luxembourg Income Study (LIS) Database, which includes income data, and the Luxembourg Wealth Study (LWS) Database, which focuses on wealth data. Since its founding, LIS datasets have been used by 8,000 researchers from around the world to analyse economic and social policies and their effects on outcomes including poverty, income inequality, employment status, wage patterns, gender inequality, family formation, child-wellbeing, health status, immigration, political behaviour and public opinion. The newer LWS datasets enable research on wealth portfolios, asset levels, and the interplay between household income and wealth. According to the Publish and Perish software that retrieves and analyses academic citations, the Hirsch's h-index is above 160 for LIS and 55 for LWS. LIS is a unique resource not only with respect to the breath of its data offering (it is the only data archive in existence that includes income, wealth and labour market microdata, over time and in one place from such diverse geographic regions and at such varied income levels), but also because it is the only archive providing access to confidential microdata through a secure remote execution system, that allows thousands of registered users all over the world to receive the logs of their statistical queries in real time (an average of about 70,000 requests are processed every year). LIS has also long operated as a venue for researchers and practitioners to exchange research ideas, results, and methods. These exchanges take place through the widely accessed Working Paper Series (now including 840 papers), the Visiting Scholar program, pre- and postdoctoral postings, annual workshops and conferences. The participating countries are high-income and middle-income countries. LIS will continue to grow to include many more middle-income countries' datasets, enabling greater comparative research opportunities. Additionally, it is now seeking to expand its data offerings in terms of increased frequency of data availability, and improved tools for data access and meta data. The UK has always had an important role in LIS since its very inception in the 1980s, when British economist Tony Atkinson gave a fundamental contribution to its construction and development (he later become the president of its Board). Individuals and organisations in the UK have been actively engaged with LIS for over three decades, providing data, contributing financing and serving as board members. Researchers in the UK have queried the microdata; produced publications, government reports and working papers using the LIS data; attended summer workshops; participated in the Visiting Scholar program; contributed to research conferences and conference volumes; and provided invaluable intellectual guidance and direction regarding LIS' activit