The main distinction we identified between the two tenures was that market housing is allocated according to effective demand while social housing is allocated according to to need, the assumption being that the market will not provide according to a socially determined level of need that is different from effective demand. The starting point of the research project was our impression that private initiatives were increasingly being used to provide social rental dwellings in different European countries. We termed these initiatives the state agent or contract model. In other words, we assumed that these initiatives were making the boundaries between social and market renting less distinct. In order to analyze the similarities and differences between social and market rented housing, we have developed and applied the concept of a gap between the two forms of tenure. In this chapter, we will summarize the existence of a gap between social and market renting in the six countries studied in Chapters 3 to 8, and consider the actions that are or could be in place to reduce or bridge the gap. Firstly, we will summarize the differences and similarities between social and market renting using the first two of the three perspectives. In all cases, we defined ‘the’ gap as a summary measure of different aspects or dimensions. How the gap can be bridged is the topic of Section 9.6. The chapter finishes with an evaluation of our framework. we will analyze the gaps between social and market renting in the six countries in two general aspects.