A large scale economic recovery package is needed to create jobs quickly, provide relief for workers and families, help states facing severe budget shortfalls, and invest in innovation and emerging industries, a bipartisan panel of economic experts and scientists told lawmakers on Capitol Hill. Economists warned that, unless comprehensive action is taken, the economy will shed another 3 million jobs in 2009, real Gross Domestic Product could drop by $750 billion, and the unemployment rate will top 10 percent.