Lecture 17: Mundell-Fleming model with perfect capital mobility

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Lecture 17: Mundell-Fleming model with perfect capital mobility Fiscal policy fixed vs. floating rates Monetary policy The Impossible Trinity Application to European monetary integration Application to emerging market response to crises. ITF-220 Prof.J.Frankel

As κ goes to ∞, the interpretation of BP line changes. Y i* BP line becomes flat <= slope m/κ = 0. It’s no longer “KA > 0 above BP=0 line,” but rather “KA = +∞ above BP line,” or more precisely, “arbitrage forces i = i*.” If domestic country is small in world financial markets, i* is exogenous at . So BP line says that i is tied down to . ITF-220 Prof.J.Frankel

(with κ=∞) fiscal & monetary Consider (with κ=∞) fiscal & monetary policy under fixed exchange rate and floating exchange rate. ITF-220 Prof.J.Frankel

Fiscal expansion. Monetary expansion. If E is fixed, If E is fixed, money inflow (instantaneous & immune to sterilization) brings i back down => full multiplier effect on Y: no crowding out. Monetary expansion. If E is fixed, money outflow (instantaneous & immune to sterilization) brings i back up => effect on Y = 0. If E floats, instantaneous appreciation brings i back down => effect on Y = 0 : 100% crowding out. If E floats, instantaneous depreciation brings i back up => maximum effect on Y . ITF-220 Prof.J.Frankel

Thus κ=∞ is the limiting case of the results we got in the sequence κ = 0, >0, >>0. Fiscal expansion loses effect under floating. <= crowds out TB (via $ ↑ ), supplementing traditional crowding out of I (via i ↑ ); gains effect under fixed rates. <= no crowding out <= automatic monetary accommodation via reserve inflow. Monetary expansion gains effect under floating. <= stimulus to TB (via $ ↓) supplements the stimulus to I (via i ↓); loses effect under fixed rates <= money flows out via BoP. ITF-220 Prof.J.Frankel

THE IMPOSSIBLE TRINITY We can attain any two of the three desirable attributes, but not all three: Perfect Capital Mobility (Financial Integration) Truly Fixed Exchange Rates (Currency Integration) Monetary Independence (Full National Sovereignty)

At each corner of the triangle, it is possible to obtain fully 2 attributes, but not 3. ● ● ● As κ rises, the choice between monetary independence & exchange rate stability sharpens. ITF-220 Prof.J.Frankel

Application of Impossible Trinity to European monetary integration In the 1992 crisis of the European exchange rate mechanism (ERM), Spain and Portugal temporarily gave up their new financial openness (reinstating controls). Britain gave up its new link to the other European currencies, dropping out of the ERM. Austria and the Netherlands continued to cling to the DM. By the late 90s, however, 11 countries had given up capital controls and (in 1999), their own currencies; as a result, interest rates converged. ITF-220 Prof.J.Frankel

EMU-headed countries fully converged by 1998. Convergence of interest rates among €-headed countries: 1995-98. EMU-headed countries fully converged by 1998. ITF-220 Prof.J.Frankel

Consequences for euro periphery countries of the loss of ability after 1999 to set their own interest rates In the years before 2008, their economies needed higher i than the i* set in Frankfurt – especially Ireland, which had an unsustainably strong boom initially based fully on fundamentals (“Celtic tiger”), but then turning to bubble (via bank loans & housing prices). In the years after 2008, they needed lower i than the i* set in Frankfurt – worsening the recessions in the periphery the Baltics, 2009 Greece, Ireland, Portugal, Spain, 2010-14. ITF-220 Prof.J.Frankel

Application of Impossible Trinity to emerging market crises of 1994-2001 A few crisis victims reinstated capital controls (Malaysia, 1998), while some major spectators resolved to keep theirs (China & India). Many crisis victims chose to give up their exchange rate targets: Mexico (1994), Korea (1997), Indonesia (1998), Brazil (1999), Argentina (2001), Turkey (2002). Some economies re-affirmed their institutionally-fixed exchange rates (Hong Kong), while others dollarized for the first time (Ecuador, El Salvador). Fewer countries changed regimes in response to the 2008-09 crisis, in part because exchange rate flexibility was already greater. Brazil did adopt controls on capital inflows. ITF-220 Prof.J.Frankel

Why does i not equal i* for most countries? Country factors, as measured by i-i*- fd (c.i.d.), or by sovereign spread (or other measures that omit currency factor) Capital controls Taxes on financial transactions Transaction costs (e.g., bid-ask spread) Imperfect information (e.g., mortgages) Default risk Risk of future capital controls Currency factors, as measured by fd (currency premium) Expected depreciation of currency Exchange risk premium ITF-220 Prof.J.Frankel

EMU-headed countries fully converged starting in 1998. Addendum: interest rate convergence in the € zone EMU-headed countries fully converged starting in 1998. Greece joined in 2001. ITF-220 Prof.J.Frankel

Shortly before Slovenia joined the euro in 2007 its long-term interest rate converged to Euroland interest rates. Slovenian interest rate €-area interest rate Differential ITF-220 Prof.J.Frankel