Book excerpt: This eBook was born out of a general diagnosis that the US healthcare sector is not only one of the most studied industries in economics but also one of the areas where the field can make the most progress. Indeed, the American healthcare industry has many features that are particularly attractive to economists. It is one of (if not the) largest sectors of the US economy, accounting for almost 20% of the national Gross Domestic Product and employing tens of millions of workers. Firms range from large conglomerates to small providers, and there is strong government-private sector interaction, with federal, state, and local governments shaping policy. The industry also has many failures, is undergoing tremendous change, and produces a wealth of data (even if not always perfectly formatted). The field, however, is far from saturated. Healthcare is such a complex and intricate sector, one where details matter so much that it is almost its own subfield of economics. These high barriers to entry prevent scholars from researching healthcare topics and weaken the cross-pollination of ideas, an increasing hallmark of many other areas. This is problematic, not the least, because any major advances in healthcare economics literally save lives (and billions of dollars). This project aimed to help lower these barriers and kick-start broader collaborations.