Age: 65.

Residence: York County.

Family: Wife, Frances. They have two grown daughters, Sarah and Katie.

Education: B.A., Dartmouth (1972); M.Phil., University of London (1978), Ph.D., Massachusetts Institute of Technology (1981).

Occupation: Businessman.

Campaign website:

Background: Peace Corps volunteer in India (1968-70), headed the Wolf Organization Inc., a building-products company in York (1985-2006, 2009-present), secretary of state Revenue Department (2007-08).