NPR had a segment on Morning Edition which badly misled listeners about the potential economic impact of a temporary ban on deepwater drilling. The piece focused on the impact of oil on the economy of Louisiana and the Gulf region. In doing so, it highlighted the total impact of the oil industry, not the marginal impact of additional drilling.
For example, it told listeners that oil accounts for 16 percent of Louisiana's state GDP compared to 1 percent for fishing and 4 percent for tourism. This is an interesting set of numbers but it has nothing to do with the impact of a ban on new deepwater drilling. No one is proposing that existing wells be shut down. This means that the vast majority of this 16 percent of GDP will not be affected by the ban. (It is also worth noting that the vast majority of this 16 percent accrues to BP and quickly leaves the state.)
The piece does later give an estimate from the state's development department that the bad on drilling could lead to a loss of 20,000 jobs (this presumably includes indirect effects). By comparison, Louisiana has approximately 120,000 construction jobs. If we assume that each construction job indirectly generates 0.5 jobs elsewhere then the ban on drilling would have roughly the same impact as a ten percent decline in construction employment.