Resurgent landlordism in a student city: urban dynamics of private rental growth

Many countries have seen a remarkable revival of private-rental housing markets in recent years. Academic literature so far has focused on theorizing the political-economic drivers of reinvestment in the tenure or on charting aggregate trends. This paper adds to these literatures in several ways based on a fine-grained analysis of housing market transformations in Groningen, a medium-sized university city in The Netherlands. First, we reveal the variegated trajectories through which private-rental growth materializes on the ground and untangle the role of different types of landlords. While small-scale private landlords remain dominant, we find a clear and important trend toward property concentration. Second, we highlight variations in spatial investment strategies across landlord types. Third, we reveal how contemporary dynamics of increased landlordism play out in a medium-sized city, embedded in a context of national private rental resurgence and local housing market pressures of a growing student city

De politiek van buy-to-let

Mounting concerns exist that small private investors exacerbate the urban housing crisis, by purchasing dwellings to rent out so-called ‘buy-to-let’ purchases. By buying up property, they may drive up house prices and exclude regular house-seekers. In this paper, we show that buy-to-let purchases constitute an increasing share of all purchases on the Dutch housing market, and especially so in larger cities and university cities. We argue these local trends do not emerge out of thin air and are not a ‘natural’ market process but should be considered the product of both global economic developments and national policies supporting these changes. Global developments include the increased mobility and ample availability of capital, exemplified by a prolonged low interest environment and a growing scarcity of high quality collateral and investment opportunities, making housing attractive for storing capital. Dutch housing policies have increasingly restricted access to social rent to low-income groups, while blowing up house prices fuelled with mortgage debts. As a consequence, a growing number of households falls in-between these two tenures: they have to resort to private rent. Private investors respond to and accommodate this demand through buy-to-let investments. Furthermore, the Dutch national government has made steps to relax regulation on the private-rental market and weakened tenant rights. In so doing, it sets the scene for amplifying social and spatial inequalities between the property rich and the property poor

On the Convergence of Ritz Pairs and Refined Ritz Vectors for Quadratic Eigenvalue Problems

For a given subspace, the Rayleigh-Ritz method projects the large quadratic eigenvalue problem (QEP) onto it and produces a small sized dense QEP. Similar to the Rayleigh-Ritz method for the linear eigenvalue problem, the Rayleigh-Ritz method defines the Ritz values and the Ritz vectors of the QEP with respect to the projection subspace. We analyze the convergence of the method when the angle between the subspace and the desired eigenvector converges to zero. We prove that there is a Ritz value that converges to the desired eigenvalue unconditionally but the Ritz vector converges conditionally and may fail to converge. To remedy the drawback of possible non-convergence of the Ritz vector, we propose a refined Ritz vector that is mathematically different from the Ritz vector and is proved to converge unconditionally. We construct examples to illustrate our theory.Comment: 20 page