There is a series of different types of risk on the housing market and related industries.  The six papers in this doctoral dissertation are about a number of the many dimensions of risk management on the housing market. The main message of this thesis is that it should be possible for different actors in the housing market to improve risk management. Indeed, the last years’ financial turmoil has revealed that it should not only be possible, but also necessary, to improve risk management at all levels of the economy: at household, corporate, regional, national and international level. Although the complexity of the environment in which we live and act makes it very difficult to predict and quantify risk, the development of risk management techniques should make it possible to better indentify, and reduce risk. The first paper provides a systematic overview of a wide selection of methods or strategies used in different countries to expand but also to maintain home ownership among low income households. The second paper further discusses mortgage and home equity insurance instruments discussed in the first paper. This paper also discusses how a rental insurance policy, as an alternative to traditional rent regulation, may be constructed. Paper 3 develops a formula that might be used in order to value the rental insurance option discussed in paper 2. The fourth paper focuses on the housing building sector by discussing potential benefits of strategic alliances that the different actors in the housing construction market may establish in order to pool resources and manage development risks. The challenge of constructing reliable home price indexes has attracted scholars for many years. Paper 5 develops monthly quality-adjusted price indexes for condominiums (housing cooperative apartments) based on a unique dataset covering sales in the whole of Stockholm municipality from January 2005 to June 2009. Finally paper 6 pays attention to the large increase in housing cooperative conversions sine the 1990s, by deriving a closed-form valuation formula that might be used to value the embedded option an owner of a multi-family rental property has to sell it to a housing cooperative. / QC 20100810

La stratégie «Adequate shelter for all and sustainable settlements development in an urbanising world» adoptée au sommet mondial Habitat II d’Istanbul de 1996, traduite dans les Objectifs du Millénaire pour le Développement et maintenant dans les Objectifs de Développement Durable, vise à fournir un logement décent au plus grand nombre de ménages dans les villes du monde et celles d’Afrique Subsaharienne en particulier. La crise du logement caractérisée par les conditions abjectes dans lesquelles la majorité des ménages des villes d’Afrique subsaharienne se logent, devient ainsi un problème majeur auquel la littérature spécialisée promeut généralement, parmi tous les modes d’occupation du logement, l’accession à la propriété comme la panacée. En supposant que cette dimension de la crise du logement ne peut s’expliquer que par les comportements résidentiels des ménages généralement autopromoteurs de leurs logements en Afrique de l’Ouest, et à Lomé la capitale du Togo en particulier, cette thèse de doctorat vise à répondre à la question générale de recherche suivante : Les choix résidentiels à Lomé, en particulier le choix du statut d’occupation du logement, sont-ils exclusivement influencés par le profil des ménages occupants? Par une approche mixte d’écologie urbaine basée sur des analyses croisées de régression logistique multinomiale appliquées à trois sources de données (RGPH4 de 2010, QUIBB de 2011, TERRAIN 2013) étayées par l’analyse biographique relative aux stratégies résidentielles d’un échantillon de 411 ménages participants dans quatre quartiers de Lomé, choisie comme base empirique, la recherche a plus ou moins confirmé les hypothèses émises a priori par les résultats principaux suivants: En lien avec la faible mobilité résidentielle générale qui caractérise les pratiques résidentielles à Lomé, les ménages choisissent, en élaborant des stratégies «de petits pas», leur statut d’occupation du logement suivant des trajectoires résidentielles surtout ascendantes, en fonction plus de leur profil démographique (âge, genre, statut migratoire et matrimonial, type et taille) que de leur statut socioéconomique (revenu, emploi, éducation). Ces choix résidentiels sont également déterminés par les attributs des logements (typologie, localisation et accès aux services de base) constituant les parcs résidentiels existants. Les ménages propriétaires de Lomé, souvent biparentaux, sont plus âgés, plus larges que les ménages locataires et hébergés. Les natifs de la ville et les migrants de longue date sont plus enclins à être propriétaires et durablement hébergés que les nouveaux arrivants. Globalement plus fortunés que les hébergés, les propriétaires ne sont pas forcément plus nantis et plus éduqués que les locataires. L’habitat de cour, habitation multifamiliale majoritaire dans le parc résidentiel de Lomé, bien qu’il abrite des ménages de tous les statuts résidentiels, il est surtout réservé aux locataires. La thèse suggère que des programmes accrus de financement institutionnel du logement, de rénovation générale du parc résidentiel existant et de production d’une version améliorée de l’habitat de cour, avec l’assistance technique publique, contribueront à fournir un logement décent au plus grand nombre de ménages qu’ils soient propriétaires, locataires ou hébergés, à Lomé et ailleurs dans les villes d’Afrique de l’Ouest, conformément au paradigme actuel du développement durable des établissements humains. / «Adequate shelter for all and sustainable settlements development in an urbanizing world», strategy adopted in 1996 at the World Summit Habitat II of Istanbul and expressed in the Millennium Development Goals and now in Sustainable Development Goals, aims to provide a decent housing for the greatest number of households in the world and especially in sub-saharian African towns. Since then, access to adequate housing becomes an important issue for housing research in developing and sub-Saharan African countries where most of households still live in abject conditions of lack adequate water and sanitation services which, among others, typify the acute housing crisis they are facing up to. Housing policies and literature generally promote homeownership as the panacea to solve this size of the housing shortage. Assuming that this housing crisis in West Africa, especially in Lomé the capital of Togo, should be explained by the residential behavior of the households, who are self-help promoters in majority, this doctoral thesis try to answer the following general research question: Are the residential choices in Lomé, especially tenure choice, exclusively influenced by the occupier households’ characteristics? By a mixed approach of urban ecology based on multinomial logistic regression cross-study analyses applied to three data sources (RGPH4 2010, QUIBB 2011 and 2013 field survey data) supported by the life histories concerning the residential strategies of a sample of 411 households in four areas of Lomé chosen as empirical basis, the research confirms more or less the assumptions made, by the following main results: In connection with the general low residential mobility that characterizes the residential patterns in Lomé, households make their tenure choices through especially upward trajectories by developing strategies of «small steps», more according to their demographic profile (stage of life cycle, age, gender, migratory and marital status, type, size) than their socioeconomic status (income, employment, education). These residential choices are also determined by the characteristics of the existing residential parks (typology, location, access to basic services of housing). We find that owner-occupiers are often bi-parental households headed by men, older and larger than renter and free-holder households in Lomé. Native and long-term migrant households are more likely to be homeowners and long-term sharers than those who recently migrate. Homeowner households are overall well-off than free-holders, but they are not necessary wealthier and better educated than the renters. The thesis also shows that family house which mainly makes up the residential park of Lomé, is especially kept for renters, although it shelters households of all the tenures. We suggest that steady programmes of housing finance systems extended to all the sectors of the society, concentrated on the access of the current housing stock to basic services and on the supply, with the public technical support, of an improved version of family house, will largely contribute to offer a decent housing to most of the households in Lomé as elsewhere in West African cities, whether they are owner-occupiers, renters or sharers.