ECON 101 Lecture Notes - Lecture 11: Marginal Product, Quantitative Easing

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Economics 101
Lori Leachman
Part 11 Lecture
Recessionary Cases:
o Keynesian - AD oriented
Decrease in AD leads to lower price levels, lower income
Unemployment rises - use fiscal policy to remedy
Increase government spending to increase AD
o Classical - AS oriented
Decrease in AS leads to higher price levels, lower income
Unemployment rises (but is voluntary) - no need to do anything
Deflation
o Good deflation - due to increased productivity
Increase in AS causes price level (PL) to decrease
Increase income (Y) to handle burden of debt
Increase in Dlabor causes marginal product of labor (MPL) to increase
Allows for increased wage or hire more workers (or both)
o Bad deflation - due to collapse in spending (decreased G)
Decrease in AD causes price level (PL) to decrease
Decrease in income (Y) making burden of debt worse
Decrease in Dlabor causes marginal product of labor (MPL) to decrease
Forces firms to fire workers or pay them less (or both)
Bad deflation example: Depression & Financial Crisis of 2007
o Depression started with stock crash; 2007 crisis started with housing bubble bursts
Decline in wealth and expectations worsen
Decline in consumption spending (C) and investment (I) cause decline in TS and
AD
o Price level falls and income falls, unemployment rises - leads to more
decline in consumption and investment (worse expectations) - multiple
shifts in AD downward - leads to downward spiral
o Halt process using stimulus
WPA, Public Works Project during Depression and public stimulus package in 2007
Expansionary fiscal policy (increase in government spending)
During Depression, used tight monetary policy (mistake) - made depression worse
During 2007, also added expansionary monetary policy on top of fiscal
Quantitative Easing 1, 2, 3
o Doing more than buying bonds, but also buying bad assets
Giving banks cash and taking bad assets off banks - liberate
banks to resume lending
Increases AD to rebuild economy
o Tranche - mortgages
Top tranche - best mortgages - low yield
Bottom tranche - poor mortgages - high risk but high yield
Led banks into crisis
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