Every government says it wants to create jobs. One way to do it is to offer tax incentives to companies that move to or expand in the state. That’s what New Jersey did under former Gov. Chris Christie. Boosters say the tax breaks have spurred a wave of economic development, especially in struggling cities like Camden. But current Gov. Phil Murphy says the program is too expensive, lacks oversight, and that some companies aren’t delivering on their promises. On this episode of The Why, WHYY reporter Joe Hernandez explains why it’s hard to tell if programs like these work.