While Philadelphias manufacturing activities have been declining for the last few years, the service sector has emerged as the predominant economic force driving current and future growth in the city. Greater Philadelphia has the second-largest health care industry in the nation. It has also become a major materials development and processing center, with more than 100,000 individuals involved in the manufacture of chemicals, advanced materials, glass, plastics, industrial gases, metals, composites, and textiles.Major employers include GlaxoSmithKline, Amkor Technology Inc., American Home Products Corporation, Amerigas, Boeing, Giant Food Stores Inc., Lockheed Martin, Merck, University of Pennsylvania Hospital, and Vanguard Group Inc.The Philadelphia Business Journal is in the Philadelphia, PA DMA. The Philadelphia Business Journal is part of the City Business Journal Network and offers ROP and insert advertising opportunities in its daily circulation. Echo Media has direct relationships with over 7,500 newspapers providing tremendous local coverage.