I am an urban geographer and housing researcher with research interests in housing policy, inequality, and political economy. One strand of my work focuses on how market processes and state policies produce and promote urban social inequalities, such as gentrification and segregation. Another strand looks at the development of housing systems, particularly in the Western European context. Currently, I am assistant professor at the Faculty of Spatial Planning, Vienna University of Technology. I have previously worked at the University of Amsterdam, Netherlands and the Bauhaus-Universitaet Weimar, Germany. I am Associate Editor of the International Journal of Housing Policy and member of the editorial collective of suburban. Zeitschrift für kritische Stadtforschung as  well as current Editor-in-Chief of the journal The Public Sector. I am also co-founder and regular contributor to the blog urbanizm.net. This website gives an overview of my research activities. It also includes regular updates on my current projects. 

Most recent publication
Kadi, J, Hochstenbach, C & C Lennartz (2019). Multiple property ownership in times of late homeownership: a new conceptual vocabulary. International Journal of Housing Policy, 20(1). 
The number of individuals and households that own an additional property beyond their primary home is on the rise in several countries. However, recent studies have been inconsistent in describing such properties, referring, for instance, to the return of private small-scale landlordism, the proliferation of second homes, or the significance of dwellings that are held as investment properties. Rarely are these disparate issues considered together, either theoretically or empirically. This special issue mobilizes the concept of multiple property ownership (MPO) to provide a more integrated analysis. In this introduction to the special issue we propose multiple property ownership as a conceptual banner that includes second homes, buy-to-let properties, holiday rentals, intergenerational support properties and safe deposit box properties. While these properties may differ considerably in terms of purpose and use, we argue that they are part of a broader proliferation of property wealth accumulation at the household level. Considering multiple properties together can motivate a deeper understanding of property wealth concentration and changing property relations in the post-crisis context. We introduce a typology of multiple property ownership, discuss the consumption and investment value of different property types, and outline some drivers of multiple property ownership, before considering implications for housing research. We end with a brief discussion of the five articles in this special issue and how they deepen current understanding of multiple property ownership. View paper