Barroalso estimates tax multipliers based on the effects on GDP of changes inaverage marginal tax rates from federal and state and local income taxes, andsocial security payroll taxes.

Then why did the outbreak of this widely anticipated civil war in a strategically marginal country convince Washington that America's security was in danger?

To optimize the operation of power system, it is necessary to establish security constrained economic dispatch(SCED) and introduce locational marginal pricing(LMP)method.