New Haven's economy originally was based in manufacturing, but the postwar period brought rapid industrial decline; the entire Northeast was affected, and medium-sized cities with large working-class populations, like New Haven, were hit particularly hard. Simultaneously, the growth and expansion of Yale University further affected the economic shift. Today, over half (56%) of the city's economy is now made up of services, in particular education and health care; Yale is the city's largest employer, followed by Yale – New Haven Hospital. Other large employers include St. Raphael Hospital, Smilow Cancer Hospital, Southern Connecticut State University, Assa Abloy Manufacturing, the Knights of Columbus headquarters, Higher One, <answer>Alexion</answer> Pharmaceuticals, Covidien and United Illuminating. Yale and Yale-New Haven are also among the largest employers in the state, and provide more $100,000+-salaried positions than any other employer in Connecticut.[citation needed]
What pharmaceutical company serves as a large employment provider for New Haven? 
Alexion