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1 Figure: EUR-USD Exchange Rate SuSe Monetary Policy and EMU: Open Economy Setting

2 Figure: EUR-USD Exchange Rate SuSe Monetary Policy and EMU: Open Economy Setting

3 Figure: Indirect Quotation and Price Quotation SuSe Monetary Policy and EMU: Open Economy Setting

4 Real Exchange Rates real exchange rate price of domestic goods in terms of foreign goods. where P is the domestic price level, P* is the foreign price level and E is the nominal exchange rate (expressed in foreign currency divided by domestic currency). SuSe Monetary Policy and EMU: Open Economy Setting

5 Interest Parity SuSe 2013 Monetary Policy and EMU: Open Economy Setting 5

6 Interest Parity SuSe 2013 Monetary Policy and EMU: Open Economy Setting 6

7 Interest Parity SuSe 2013 Monetary Policy and EMU: Open Economy Setting 7

8 Interest Parity Euro US $ $ SuSe 2013 Monetary Policy and EMU: Open Economy Setting 8

9 (Uncovered) Interest Parity SuSe 2013 Monetary Policy and EMU: Open Economy Setting 9

10 (Uncovered) Interest Parity SuSe 2013 Monetary Policy and EMU: Open Economy Setting 10

11 Purchasing Power Parity The law of one price in the context of open economy two identical goods must sell for a price that is the same when translated into a common currency: e.g. E P = P* + C where P, P* domestic price, foreign price, E price of the domestic currency (i.e $/ ), C transaction cost. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 11

12 Purchasing Power Parity (PPP) SuSe 2013 Monetary Policy and EMU: Open Economy Setting 12

13 Figure: Nominal and real exchange rates: Germany vs. UK, SuSe 2013 Monetary Policy and EMU: Open Economy Setting 13

14 The Balassa-Samuelson Effect Average yearly inflation in Eurozone countries, (%) SuSe 2013 Monetary Policy and EMU: Open Economy Setting 14

15 The Balassa-Samuelson Effect SuSe 2013 Monetary Policy and EMU: Open Economy Setting 15

16 The Balassa-Samuelson Effect SuSe 2013 Monetary Policy and EMU: Open Economy Setting 16

17 The Impossible Trinity Impossible trinity principle: only two of the three following features are compatible with each other: The point is that you can t have it all: A country must pick two out of three Paul Krugman (1999) SuSe 2013 Monetary Policy and EMU: Open Economy Setting 17

18 The Impossible Trinity There are examples for each side of the impossibility triangle: - Full capital mobility, autonomous monetary policy, flexible exchange rate: Eurozone as a whole, USA, Japan, UK, Switzerland, Sweden: exchange rate can be quite volatile; ability to conduct short-run stabilization. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 18

19 The Impossible Trinity - Full capital mobility and fixed exchange rate: Exchange Rate Mechanism: shallow distinction between such a policy and euro membership. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 19

20 The Impossible Trinity - Fixed exchange rate, monetary policy autonomy, capital controls: many developing and emerging countries (e.g., Brazil, China): people try to evade the restrictions; negative effects on investment and growth. What happens when one tries to violate the impossible trinity? A currency crisis: sooner or later a speculative attack wipes out the fixed exchange rate arrangement. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 20

21 Exchange Rate Regimes - Free floating; - Managed floating: central banks buy their own currency when they consider it too weak, and sell it when they see it as too strong, but they refrain from pursuing any particular exchange rate target; - Fixed exchange rates or target zones: authorities declare an official parity vis-à-vis another currency or a basket of currencies, with margins of fluctuations around the central parity (i.e., target zone); - Crawling pegs: central parity and band of fluctuation around it, which are allowed to slide regularly: they crawl. The rate of crawl is sometimes pre-announced, sometimes not; SuSe 2013 Monetary Policy and EMU: Open Economy Setting 21

22 Figure: Poland s crawling band, May 1995 March 2000 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 22

23 Exchange Rate Regimes - Currency boards: a tight version of fixed exchange rate regimes. The central bank may only issue domestic money when it acquires foreign exchange reserves. If it spends its foreign exchange reserves, the central bank must retire its own currency from circulation and the money supply shrinks; - Dollarization/euroization and currency unions: a stricter regime is to fix the exchange rate irrevocably, by adopting a foreign currency, hence the term dollarization (as in Ecuador, El Salvador, Panama, Liberia) or euroization (as in Kosovo and Montenegro). SuSe 2013 Monetary Policy and EMU: Open Economy Setting 23

24 Exchange Rate Regimes European Monetary System (EMS) - 8 members of EEC fixed exchange rates with one another and floated against the U.S. dollar (Exchange Rate Mechanism - ERM) - ECU value was tied to a basket of specified amounts of European currencies - Fluctuated within limits - Led to foreign exchange crises involving speculative attack SuSe 2013 Monetary Policy and EMU: Open Economy Setting 24

25 Exchange Rate Regimes Inflation during the ERM years: SuSe 2013 Monetary Policy and EMU: Open Economy Setting 25

26 Exchange Rate Regimes French Franc/ DM during the ERM years: SuSe 2013 Monetary Policy and EMU: Open Economy Setting 26

27 Exchange Rate Regimes The 1990s was a decade of violent currency crises: Europe s ERM was hit in ; Latin America followed in ; Southeast Asia s turn in ; and Russia in These countries were operating one or another form of a peg, but countries like Hong Kong and Argentina, both with a currency board, escaped the apparently contagious wave. This has made popular the two-corner view according to which the only safe regimes are the extremes ones, free floating or hard pegs. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 27

28 The Monetary Model Links exchange rate movements to balance of payments equilibrium Dominant Theory of 1970s Still used for medium- to long-term forecasting. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 28

29 The Monetary Model The Monetary model rests on three assumptions: 1. the aggregate supply curve is vertical 2. the demand for real money balances is a stable function of only a few domestic macroeconomic variables using the Cambridge quantity equation in equilibrium, M s d M kpy k 0 where y is real national income 3. PPP obtains at all times. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 29

30 Figure: Aggregate demand with the quantity equation SuSe 2013 Monetary Policy and EMU: Open Economy Setting 30

31 The Monetary Model: Disturbance: M 0 s increases to M 1 s SuSe 2013 Monetary Policy and EMU: Open Economy Setting 31

32 The Monetary Model: Equilibrium which is solved for S as: M s kpy ksp * y S M s / * kp 0 y The exchange rate is the ratio of the money stock to the demand, measured at the foreign price level. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 32

33 The Monetary Model Home currency will depreciate (S will increase) whenever: Home money stock increases Home real income decreases Foreign price level falls. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 33

34 Figure: Income increase under floating exchange rates SuSe 2013 Monetary Policy and EMU: Open Economy Setting 34

35 Figure:Foreign price increase under floating exchange rates SuSe 2013 Monetary Policy and EMU: Open Economy Setting 35

36 The Monetary Model: Two-country model of a floating exchange rate The foreign-country version of the quantity equation: * * M d k P * y * foreign demand for money, proportional to foreign nominal income M s s* * * * / M kpy / k P y 0 0 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 36

37 The Monetary Model: Two-country model of a floating exchange rate Under PPP, M P/ P * S s s* * * / M ksy / k y 0 0 Solving for S, S M / M * ky / k y * * the exchange rate equals the ratio of the relative money stocks to the relative real demands. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 37

38 The Monetary Model: Fixed Exchange Rates Money stock endogenous, since monetary policy is needed to defend the fixed exchange rate Money stock contains FX component which increases (decreases) when there is excess demand (supply) for domestic currency, hence, domestic credit is the monetary policy instrument not the money supply as a whole Endogenous: P, FX Exogenous: y, P*, DC. FX+DC=M s SuSe 2013 Monetary Policy and EMU: Open Economy Setting 38

39 Figure: Domestic credit and money stock M s 0 FX0 DC0 M s 1 M s 0 DC 1 DC 0 FX 2 FX 0 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 39

40 Figure: Domestic credit increase under fixed rates SuSe 2013 Monetary Policy and EMU: Open Economy Setting 40

41 Money Supply Increase If reserves = Money stock: FX 0 M s 0 FX0 DC0 Under a fixed exchange rate regime, the policy variable for the money supply is domestic credit, DC 0 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 41

42 Money Supply Increase If the exchange rate is pegged at S 0, under PPP, P S P * 0 M d ks * s 0P y M FX DC0 FX ks * 0P y DC0 The foreign currency reserves must be equal to the gap between given demand for domestic money supply generated by the local banking system. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 42

43 Conclusions regarding fixed exchange rates In a fixed exchange rate system, the (change in the) stock of reserves simply fills the gap between the demand for money and the domestically generated supply (DC) Domestic credit expansion changes nothing, except composition of money stock: increase (decrease) in DC is offset by fall (rise) in reserves, hence, post-expansion money stock is: M s 1 = FX 1 +DC 1 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 43

44 Q. What happens if authorities prevent money stock eturning to its previous level by further increases in DC? Sterilization can only work in the short run, if at all. Pushing the M s curve back out simply repeats the same process of balance of payments deficit followed by reserve loss The longer the policy is sustained, the greater the domestic credit component of M s and the smaller the reserve backing At some point, fall in reserves leads to collapse of fixed exchange rate as speculators sell currency. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 44

45 Change in real income under fixed exchange rate Initial situation: M s 0 = P 0 = 1 ky 0 = 1, since M s 0 = kp 0 y 0 Now y changes, so the above equation no longer holds, and the link between the second and third graphs broken! Disturbance: shift in AS-curve P P AS 0 AS 1 M s P = SP 0 * FX+DC 0 P 1 P 0 P 0 =1 M s 1 P 1 M s 0 M s 1 M s 0 S DC 0 Y r 0 Y r 1 Y r FX 0 FX 1 SuSe 2013 Monetary Policy and EMU: Open Economy Setting 45 FX

46 SuSe 2013 Devaluation under fixed exchange rates

47 Conclusions regarding devaluation Devaluation raises domestic competitiveness creating temporary balance of payments surplus and consequent reserve increase, until money stock increases in same proportion as devaluation Final outcome: higher domestic price level with cheaper domestic currency means real exchange rate (competitiveness) unchanged, balance of payments back in balance Only change: one-off increase in reserves. SuSe 2013 Monetary Policy and EMU: Open Economy Setting 47

48 Interest rates in the monetary model Interest rate increase under floating exchange rates SuSe 2013 Monetary Policy and EMU: Open Economy Setting 48

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