i m fredricka whitfield. your money starts now. president obama has a massive w plan to jump-start the economy. will it work? i m ali. christine is off this week. obama is proposing billions of dollars of infrastructure money meant to besed for high-structure rail, building roads, the kind of money you see going to construction workers. $100 billion in an exnsion of tax credit to companies who invest money in research and devepment, and 200 billion as a new tax credit to companies who build physical plants, buildingor invest in equipment. let s go right to diane swan. she is chief economist. putting aside whether this can even get through congress before mid-term elections, is this too little too late, or could this actually work? the problem is thert lag tim, particularly on infrastructure projects, are so long that it won t do anything before the end of the year or even in 2011. maybe we ll see something by the end of 2011, but remember, much of the stimulus that was ea