Black and official market exchange rates and purchasing power parity: evidence from Latin America
Mohsen Bahmani-Oskooee
Center for Research on International Economics, University of Wisconsin-Milwaukee, Milwaukee, WI, 53201, USACorrespondence[email protected]
,
Ali M. Kutan
Department of Economics, Southern Illinois University, Edwardsville, IL, 62026-1102, USA
&
Su Zhou
Department of Economics, University of Texas at San Antonio, San Antonio, TX, 78249-0633, USA
A group of studies have shown that in less developed countries, Purchasing Power Parity (PPP) theory is supported more often when black market exchange rates rather than official rates are used in the testing procedure. They have all relied upon linear Augmented Dickey–Fuller (ADF) test applied either to the residuals of a cointegrating vector or to real exchange rates. In this article, we use a nonlinear ADF test and show that when nonlinearity is incorporated in the testing procedure, the nonlinear tests support PPP more often than the linear test regardless of whether we use official or black market exchange rate. Besides, for the post-Bretton Woods period, PPP is almost equally supported using either the black market exchange rates or the official rates.
Acknowledgement
Valuable comments of two anonymous referees are greatly appreciated without, of course, implicating them.
Notes
1Taylor et al. (Citation2001), Liew et al. (Citation2004), Chortareas and Kapetanios (Citation2004), Sarno et al. (Citation2004) and Bahmani-Oskooee et al. (Citation2007) are examples of other studies that have applied nonlinear tests to PPP.
3Another reason for the presence of nonlinear ties in both nominal and real exchange rates could be the interaction of technical and fundamental traders or disagreement between fundamentalists with regard to the proper equilibrium rate. Technical traders may drive the exchange rate away from equilibrium, and only when it is too far away, do all of the fundamentalists agree that it is too far away and take action to change the course. For more details see Allen and Taylor (Citation1990), Kilian and Taylor (Citation2003), Taylor (Citation2004), Menkhoff and Taylor (Citation2007) and Reitz and Taylor (Citation2008).
4They include Culbertson (Citation1975), Phillip (Citation1988), Bahmani-Oskooee (Citation1993), El-Sakka and McNaab (Citation1994), Baghestani (Citation1997), Sanchez-Fung (Citation1999), Luintel (Citation2000), Bahmani-Oskooee and Goswami (Citation2005) and Bahmani-Oskooee and Tanku (Citation2007). For a comprehensive review of these studies and other PPP-related studies in all developing countries see Bahmani-Oskooee and Hegerty (Citation2009). See also Macdonald and Taylor (Citation1992) for another useful review of general issues.
6This section closely follows Bahmani-Oskooee et al. (Citation2007).
7See for a list of countries.
8Because of the lack of some observations, the study periods for Dominican Republic, El Salvador and Venezuela were restricted to 1960:03–1998:12, 1961:1–1998:12 and 1960:11–1998:12, respectively.
9A possible extension of the tests for nonlinearity might incorporate allowance for shifts in the equilibrium rate itself, perhaps, due to productivity bias hypothesis. This might be particularly important for developing countries. For more details, see Lothian and Taylor (Citation2000, Citation2008) and Bahmani-Oskooee and Miteza (Citation2004). For a review article on productivity bias hypothesis, see Bahmani-Oskooee and Nasir (Citation2005).
Taylor
,
M. P.
,
Peel
,
D. A.
and
Sarno
,
L.
2001
.
Nonlinear mean-reversion in real exchange rates: toward a solution to the purchasing power parity puzzles
.
International Economics Review
,
42
:
1015
–
42
.
Chortareas
,
G.
and
Kapetanios
,
G.
2004
.
The Yen real exchange rate may be stationary after all: evidence from non-linear unit-root tests
.
Oxford Bulletin of Economics and Statistics
,
66
:
113
–
31
.
Sarno
,
L.
,
Taylor
,
M. P.
and
Chowdhury
,
I.
2004
.
Nonlinear dynamics in deviations from the law of one price: a broad-based empirical study
.
Journal of International Money and Finance
,
23
:
1
–
25
.
Michael
,
P.
,
Nobay
,
A. R.
and
Peel
,
D. A.
1997
.
Transaction costs and nonlinear adjustment in real exchange rates: an empirical investigation
.
Journal of Political Economy
,
105
:
862
–
79
.
Juvenal
,
L.
and
Taylor
,
M. P.
2008
.
Threshold adjustment of deviations from the law of one price
.
Studies in Nonlinear Dynamics and Econometrics
,
12
:
1520
Kilian
,
L.
and
Taylor
,
M. P.
2003
.
Why is it so difficult to beat the random walk forecast of exchange rates?
.
Journal of International Economics
,
60
:
85
–
107
.
Menkhoff
,
L.
and
Taylor
,
M. P.
2007
.
The obstinate passion of foreign exchange professionals: technical analysis
.
Journal of Economic Literature
,
45
:
936
–
72
.
Reitz
,
S.
and
Taylor
,
M. P.
2008
.
The coordination channel of foreign exchange intervention: a nonlinear microstructural analysis
.
European Economic Review
,
52
:
55
–
76
.
Phillip
,
R. J.
1988
.
War news and black market exchange rate deviations from purchasing power parity: wartime South Vietnam
.
Journal of International Economics
,
25
:
373
–
8
.
Bahmani-Oskooee
,
M.
1993
.
Black market exchange rates versus official exchange rates in testing purchasing power parity: an examination of Iranian rial
.
Applied Economics
,
25
:
465
–
72
.
El-Sakka
,
M. I. T.
and
McNabb
,
R.
1994
.
Cointegration and efficiency of the black market for foreign exchange: a PPP test for Egypt
.
Economic Notes
,
23
:
473
–
80
.
Baghestani
,
H.
1997
.
Purchasing power parity in the presence of foreign exchange black market: the case of India
.
Applied Economics
,
29
:
1147
–
54
.
Sanchez-Fung
,
J. R.
1999
.
Efficiency of the black market for foreign exchange and PPP: the case of the Dominican Republic
.
Applied Economic Letters
,
6
:
173
–
6
.
Bahmani-Oskooee
,
M.
and
Goswami
,
G. G.
2005
.
Black market exchange rates and purchasing power parity in emerging economies
.
Emerging Markets Finance and Trade
,
41
:
37
–
52
.
Bahmani-Oskooee
,
M.
and
Tanku
,
A.
2007
.
Black market exchange rate versus the official exchange rate in testing the PPP: an application of a non-linear test
.
Comparative Economic Studies
,
49
:
632
–
41
.
Bahmani-Oskooee
,
M.
and
Hegerty
,
S.
2009
.
Purchasing power parity in less-developed and transition economies: a review article
.
Journal of Economic Surveys
,
forthcoming
Beach
,
E. D.
,
Kruse
,
N. C.
and
Uri
,
N. D.
1993
.
The doctrine of relative purchasing power parity re-examined
.
Journal of Economic Studies
,
20
:
3
–
23
.
Baffoe-Bonnie
,
J.
2004
.
Dynamic modelling of fiscal and exchange rates policy effects in a developing country: a non-structural approach
.
Journal of Economic Studies
,
31
:
57
–
75
.
Arize
,
A. C.
,
Malindretos
,
J.
and
Christoffersen
,
S.
2002
.
Monetary dynamics, exchange rates and parameter instability: an empirical investigation
.
Journal of Economic Studies
,
30
:
493
–
513
.
Apergis
,
N.
1998
.
Budget deficits and exchange rates: further evidence from cointegration and causality tests
.
Journal of Economic Studies
,
25
:
161
–
78
.
Hojman
,
D. E.
1989
.
Fundamental equilibrium exchange rates under contractionary devaluation: a Peruvian model
.
Journal of Economic Studies
,
16
:
5
–
26
.
Bahmani-Oskooee
,
M.
1999
.
The long-run relation between a black market exchange rate and the trade balance: evidence from Iran
.
Journal of Economic Studies
,
26
:
121
–
9
.
Lothian
,
J. R.
and
Taylor
,
M. P.
2000
.
Purchasing power parity over two centuries: strengthening the case for real exchange rate stability – a reply to Cuddington and Liang
.
Journal of International Money and Finance
,
19
:
759
–
64
.
Lothian
,
J. R.
and
Taylor
,
M. P.
2008
.
Real exchange rates over the past two centuries: how important is the Harrod-Balassa-Samuelson effect?
.
Economic Journal
,
118
:
1742
–
63
.
Bahmani-Oskooee
,
M.
and
Nasir
,
A. M.
2005
.
Productivity bias hypothesis and the PPP: a review article
.
Journal of Economic Surveys
,
19
:
671
–
96
.