The World Bank's report "Pancakes to Pyramids – City Form to Promote Sustainable Growth" found that a city's shape can have a significant impact on economic growth, employment, and housing affordability. The report found that compact cities, which are characterized by high population densities and mixed land use, are more economically productive and have lower rates of unemployment than sprawling cities. Compact cities also tend to have more affordable housing, as the cost of land is spread out over a larger number of people.

The World Bank's report "Pancakes to Pyramids – City Form to Promote Sustainable Growth" found that a city's shape can have a significant impact on economic growth, employment, and housing affordability. The report found that compact cities, which are characterized by high population densities and mixed land use, are more economically productive and have lower rates of unemployment than sprawling cities. Compact cities also tend to have more affordable housing, as the cost of land is spread out over a larger number of people.

The report's findings are supported by a growing body of research on the relationship between city shape and economic development. For example, a study by the Brookings Institution found that compact cities in the United States grew at an average rate of 2.5% per year between 2000 and 2010, while sprawling cities grew at an average rate of only 1.5% per year. The study also found that compact cities had lower rates of unemployment and poverty than sprawling cities.

The World Bank's report makes a number of recommendations for policymakers who are interested in promoting sustainable urban growth. These recommendations include:

* Investing in public transportation to make it easier for people to get around without cars

* Zoning for mixed land use to create a more walkable and livable environment

* Providing incentives for developers to build compact, high-density housing

By following these recommendations, policymakers can help to create cities that are more economically productive, equitable, and sustainable.

In addition to the economic benefits, compact cities also have a number of environmental benefits. For example, compact cities require less land, which can help to protect natural habitats and reduce the amount of sprawl. Compact cities also tend to have lower emissions of greenhouse gases, as people are less likely to drive when they can walk, bike, or take public transportation.

Overall, the evidence suggests that the shape of a city can have a significant impact on its economic, environmental, and social well-being. Policymakers who are interested in promoting sustainable urban growth should consider the findings of the World Bank's report and take steps to create more compact, walkable, and mixed-use cities.