Approaches to Assessing Currency Misalignment

Menzie D. ChinnUW-Madison & NBER

http://www.ssc.wisc.edu/~mchinn

Presentation at

Office of International AffairsDepartment of the Treasury

October 26, 2006

Outline

• Caveats• Methodologies• Example: China• New Approaches• Conclusion

Key Point: There Are Many Equilibrium Exch. Rates• There is no single way to get the

equilibrium rate and hence misalignment• The appropriate measure depends upon the

conditions of the economy you’re examining

• Different models will be relevant• And different models will be consistent with

different time horizons.

Methodologies

• Relative PPP• Absolute PPP/Deviations from Absolute PPP• Productivity based models• BEERs/Fair Value Models• Macroeconomic Balance/FEERs/External or

Basic Balance

Relative PPP

• Assumes that relative price levels (measured by deflators, CPIs, or PPIs) adjusted by nominal exchange rates must be revert to some average level.

• Other deflators possible -- ULCs• More flexible interpretations allow for

reversion to trends.• A long run – goods arbitrage perspective

Example: US Dollar (in real terms)

Source: DB, Exchange Rate Perspectives, October 2006.

Example: US Dollar (nom. terms)

Example: Korean Won (nom. terms)

Source: Chinn, EMR (2000)

Problems

• The relative PPP level must occur in the sample period.

• Only if the real exchange rate is stationary is the conditional mean invariant with respect to the sample.

• Related to the issue of whether the real rate is I(0), or price indices and the exchange rate are cointegrated with (1 -1 1) coefficients.

Absolute PPP• Absolute PPP requires the prices of bundles

of goods are equalized in common currency terms.

• MacParity is a special case of absolute PPP.• But Absolute PPP doesn’t hold across

countries of dissimilar incomes

The Failure of Absolute PPP-4

-20

2

6 7 8 9 10 11lrypc_ppp00

lpppcvr Fitted values

Note: Log “price level” & log income/capita in 2000$. Source: Cheung, et al. (2006); WDI.

“Penn Effect” and MacParity

Source: Pakko and Pollard, FRB SL Review (2003).

Productivity Based Models

• Balassa-Samuelson is the most prominent• Higher productivity levels in tradable sector

induces a stronger currency in real terms.• Assumes PPP for traded goods.• Perfect factor mobility w/in countries.• Isn’t the only relevant model; in two good

models, higher productivity may lead to a weaker real currency.

• Also a long run/long horizon model.

Example: China

Source: Cheung, et al., FRB SF conference paper (2005).

1.3

1.4

1.5

1.6

1.7

1.8

1.9

8 8 90 92 94 96 98 00 02 04

Real Bilat.Exchange Rate(RMB/US D)

Est'dProd'y

SzirmaiMfg. prod'y

BEER/DEER or “Kitchen Sink”

• Combination of Balassa-Samuelson, real interest differential (UIP with sticky prices), nontradables, and portfolio balance motivations (see Cheung, et al. (2005)).

Source: F. Yilmaz and S. Jen, Morgan Stanley (2001).

• Where does NFA come from? CA equals inverse of negative returns times NFA. See Lane and Milesi-Ferretti (2002).

Macro Balance and Related Approaches

• Determine a “normal” level of current account balance or “basic balance”

• “Basic balance” is current account plus financial account (sometimes FDI flows).

• Using price elasticities, back out the equilibrium exchange rate.

• If an econometric approach is used to determine “normal” level of CA, then IMF’s “Macroeconomic Balance” approach.

In-Sample Fit for CA “norms”: Korea & Emerging Asia

-.1-.0

8-.0

6-.0

4-.0

20

.02

.04

.06

.08

1971-1975 1976-1980 1981-1985 1986-1990 1991-1995 1996-2000 2001-2004period

Current Account % of GDP Fitted valueslower limit upper limit

Korea

-.08

-.06

-.04

-.02

0.0

2.0

4.0

6.0

8

1971-1975 1976-1980 1981-1985 1986-1990 1991-1995 1996-2000 2001-2004period

ea_current_m5 yhat_ea_wlower limit upper limit

Emerging Asia excluding China

Source: Chinn and Ito (2006)

In-Sample Fit: China

-.04

-.02

0.0

2.0

4.0

6

1971-1975 1976-1980 1981-1985 1986-1990 1991-1995 1996-2000 2001-2004period

Current Account % of GDP Fitted valueslower limit upper limit

China

Source: Chinn and Ito (2006)

Complications• Large prediction intervals for CA norms.• What are the relevant trade elasticities?• What are the conditioning variables (e.g.,

does one take budget deficits as given?)• Details? See Isard, Faruqee, Kincaid,

Fetherston (2001).• FEER uses a normative assessment of

equilibrium current account/basic balance.• Looking at reserve accumulation is a

variation on this approach.

Many Equil’m Rates: China

GAO (August 2005)

Relative PPP (I)

-3.1

-3.0

-2.9

-2.8

-2.7

-2.6

-2.5

-2.4

-2.3

-2.2

88 90 92 94 96 98 00 02 04

O ffic ia l rea lexchange rate(U S D /C N Y )

"Adjusted" realexchange ra te

/O fficia l trend

T rend \

Relative PPP (II)

4.0

4.4

4.8

5.2

5.6

6.0

80 82 84 86 88 90 92 94 96 98 00 02 04 06

T rade W eightedValue o f R M B

Trend

Absolute PPP and Uncertainty

-3.5

-3

-2.5

-2

-1.5

-1

-0.5

0

0.5

1

1.5

-5 -4 -3 -2 -1 0 1 2

Relative per capita income in PPP terms

Relative price level

China 2004

China 1975

Source: Cheung et al. (2006)

Recent Developments

• The role of net foreign assets, gross assets• Measurement of the effective exchange rate

Assets and Adjustment: Gourinchas-Rey

• Propose a framework for NFA-ex rate movements

• Builds upon reversion to trend in NFA • And an intertemporal budget constraint• So a deficit can be closed by either the

traditional trade channel (net exports), or• Closed by revaluation effects• NB: depreciation works in same direction

Normalized net exports/net assets

• Nxa is normalized so export weight is unity • This means it’s measured in same units as

exports.• Interpretation: nxa is (approx.) the %age

increase in exports necessary to restore ext. balance

Econometrics

First part: component that f’casts future ret.Second: component that f’casts nx growth

Estimate using VAR

Exchange Rate Adjustment

Gourinchas and Rey, “International Financial Adjustment” (2005)

Approximating G-R(in-sample)

4.3

4.4

4.5

4.6

4.7

4.8

4.9

5.0

1970 1975 1980 1985 1990 1995 2000 2005

L o g n o m in a l F e dd o lla r in d e x(m a jo r cu rre n c ie s )

F itte d2 y r a h e a d

Source: author’s calculations

Measurement: Divisia vs. geometric?

Source: Thomas and Marquez (2006)

ReferencesCheung, Yin-Wong, Menzie Chinn and Eiji Fujii, 2006, “The

Overvaluation of Renminbi Undervaluation,” paper presented at the conference on “Financial and Commercial Integration,” SCCIE-JIMFconference, Santa Cruz (Sept.).

http://sccie.ucsc.edu/webpages/conf/Cheung-Chinn.pdf

Cheung, Yin-Wong, Menzie Chinn and Antonio Garcia Pascual, 2005 “Empirical Exchange Rate Models of the Nineties: Are Any Fit to Survive?” Journal of International Money and Finance 24: 1150-1175.

http://www.ssc.wisc.edu/~mchinn/FXForecast.pdf

Chinn, Menzie, 2000, “Before the Fall: Were East Asian Currencies Overvalued?” Emerging Markets Review 1(2) (August 2000): 101-126. http://www.ssc.wisc.edu/~mchinn/BeforetheFall_EMR.pdf

GAO, 2005, “International Trade: Treasury Assessments Have Not Found Currency Manipulation, but Concerns about Exchange Rates Continue,” Report GAO-05-351 (April).

Gourinchas, Pierre-Olivier and Helene Rey, 2005, “International Financial Adjustment.” NBER Working Paper No. 11155 (February).

http://www.nber.org/w11155/

Isard, Peter , Hamid Faruqee, G. Russell Kincaid, Martin Fetherston, 2001, Methodology for Current Account and Exchange Rate Assessments, IMF Occasional Paper No. 209.

Lane, Philip and Gian Maria Milesi-Ferretti, 2002, “External Wealth, the Trade Balance, and the Real Exchange Rate,” European Economic Review 46: 1049-71.

Pakko, Michael R. and Patricia S. Pollard, 2003, “Burgernomics: A Big Mac™ Guide to Purchasing Power Parity,” Review 85(6) Nov.: 9-28.

http://research.stlouisfed.org/publications/review/03/11/pakko.pdf