This paper studies data from a 25-year period in the history of Sweden and the US, ranging from 1993 to 2017. The aim of the thesis was to investigate the impact of immigration on the income inequality of the respective countries while also considering the impact of other specific variables. In order to estimate the impact of the variables, both static and dynamic models were used, with the Gini coefficient being the dependent variable. With the ordinary least square giving short-run estimates and the error correction model providing short- and long- run estimates simultaneously, the main variable for immigration, being the foreign-born population, showed a strong positive relationship with income inequality. For the estimation, the immigration variable was also split into high- and low-skilled immigrants as well as different age groups. In conclusion, we find that immigration in Sweden and the US has high levels of influence on the income inequality for both countries.

Recently, there is an increasing interest and awareness on sustainability and sustainable development. Sustainability is comprised of the three E’s: environment, economy and equity. Of these three, the equity or the social sustainability component is often overlooked. As cities become more global and demographically diverse due to immigration, diversity’s impact to the city should be addressed through policies and plans. The content analysis and evaluation of city plans, policies and urban design examines their response to accommodating and including inter-cultural diversity using identified indicators of social sustainability and equity. This study finds that the length of time a city has been a foreign-born population hub does not statistically impact its integration of social sustainability measures in its comprehensive and sustainability plans. It concludes with best practices of sample cities and discussion on how city and other jurisdictions’ plans can incorporate, address and measure immigrant and inter-cultural responsiveness through social sustainability and equity concerns.