ITF220 - Professor J.Frankel Lecture 16: Mundell-Fleming model with a floating exchange rate Rule: if result at a given exchange rate would be a BoP deficit,

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ITF220 - Professor J.Frankel Lecture 16: Mundell-Fleming model with a floating exchange rate Rule: if result at a given exchange rate would be a BoP deficit, then result under floating is currency depreciation. Implications of capital mobility Monetary expansion: high κ => extra stimulus via net exports => more effect on Y. Fiscal expansion: high κ => crowding out of net exports => less effect on Y. Examples: –Monetary expansion (Japan 2013, ECB 2015) & contraction (UK 1980, US 1980, Japan 1990) –Fiscal expansions (e.g., US National Saving in early 1980s)

i ↓ => capital outflow => more depreciation => higher net exports Monetary Expansion κ >> 0κ > 0κ = 0 ITF220 - Professor J.Frankel

i ↑ => capital inflow => less depreciation => lower net exports Fiscal Expansion κ = 0 κ > 0κ >> 0 ITF220 - Profe J.Frankel

Example of monetary expansion (1): Abenomics depreciated the yen, Takatoshi Ito, “Abenomics: Progress, prospects and how the 2020 Tokyo Olympics can help solve Japan’s debt problem”, Dec.30, 2013, ADB Institute House of Representatives dissolved, Nov => “Abenomics” Y/$ =

ITF220 - Professor J.Frankel Example of monetary expansion (2): When ECB chief Mario Draghi announced QE Jan.22, 2015, => the euro depreciated. $/€

ITF220 - Professor J.Frankel Examples of monetary contractions under modern conditions of high κ and floating exchange rates Thatcher monetary contraction of Volcker monetary contraction of Japanese monetary contraction of In each case, i ↑, r ↑ (at A) => currency appreciated => net exports fell (B) => recession was more severe than in traditional monetary tightenings. IS IS’ LM' LM A B i y

ITF220 - Professor J.Frankel 2) German union Examples of monetary/ fiscal mix: 1) Reagan- omics, ; GDP composition shifts to G & C, away from I & X-M. The US shift in monetary-fiscal mix: from low real interest rate & low $ in the late 1970s, to high real interest rate & high $ in the mid-1980s. i Y LM IS IS′ LM′ IS′′ M contract -ion Late 1970s

We now have a causal interpretation of the NS identity US National Saving, Investment, & Current Account as Shares of GDP, Trend: Gap widened, as NS fell relative to I

Appendix: Japanese monetary expansion and yen depreciation “Abenomics”

QE: The Fed doubled the monetary base in “HSBC: don’t worry, BoJ expansion will offset end of QE,” FT, Jun 14, Kuroda in Apr announced BoJ would double over 2 years.

“Outlook Recovery on a shaky footing,” Special, Economic Research Dept., Rabobank November 13, 2013, HR dissolved, Nov => “Abenomics” Japan’s monetary easing (QQE) raised the exchange rate (Yen/$) and stock market

But Japan went back into recession in 2014 Q2, perhaps because of a big increase in the consumption tax ITF220 - Professor J.Frankel Abenomics seemed to boost growth, at first. Nov => “Abenomics ” April 2014 => Consumption tax