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RICHARD J. SWEENEY
Working Papers
Mean
Reversion in G-10 Nominal Exchange Rates
Conventional
wisdom is that industrial-country floating
exchange rates contain unit roots. SUR tests on panels of monthly
Group-of-Ten
log nominal rates reject the null of unit roots for various samples
over the
current float, with significance levels from 0.5% to 15%. In
out-of-sample
forecasts, mean-reversion models beat random walks on average, in some
forecast
periods significantly. For monthly data, the range of expected USD-DEM
appreciation rates exceeds 15%/year in the mean reversion model. Mean
reversion
places strong restrictions on international models: over the sample
period, the
G-10 had to run monetary policies consistent with stable long-run
nominal rates (Forthcoming in the Journal
of Financial and Quantitative Analysis.)
Fed
Intervention, Dollar Appreciation, and Systematic Risk
In a
four-factor
asset-pricing model estimated on daily data, Fed intervention
significantly
affects betas of surprises in the market return, expected inflation
rate, yield
curve, and corporate-bond risk premium. Fed foreign-currency sales
cause
economically and statistically significant increases in the systematic
risk
premium in appreciation and thus in the dollar's expected appreciation
rate, as
theory predicts. Intervention’s effects on actual appreciation are less
reliable;
they depend on unpredictable risk-factor realizations. Even successful
intervention to strengthen the dollar may be costly; by increasing the
dollar’s
systematic risk, intervention reduces the attractiveness of U.S. relative
to
foreign
investments. Further, uncertainty about future Fed interventions may
induce
resource misallocation: ceteris paribus, investors find it harder to
select
appropriate risk-adjusted discount rates and to forecast the
home-currency
value of cash flows. (Forthcoming in the Journal of International Money and Finance.)
Evaluating the Nordea Experiment: Evidence
from Market and Accounting
Data
Lawrence
G. Goldberg , Richard J. Sweeney
and Clas G. Wihlborg c
This
paper discusses results and difficulties of
comparing banks' performance based on publicly available data for the
case of
Nordea, a pan-Nordic bank created through mergers of important national
banks.
The objective of the performance comparison is to determine whether
Nordea's
unique strategy of functional intergation across four countries can be
advantageous. For stock-market data, however, Nordea does not have
stable betas
on risk factors, as illustrated by market betas, and thus the
comparables
method must be used with great care. The Nordea holding company
performed about
as well as the comparables, both in terms of stock-market and
accounting data.
Nordea banks in individual countries outperformed comparable holding
companies;
by arithmetic, Nordea non-bank operations are not as profitable as its
bank
operations. In event studies, the market views Nordea's acquisitions as
adding
value.(Forthcoming in the Journal of
Banking and Finance.)
Effects
of Price Limits on Information Revelation:
Theory
and Evidence
Kenneth A. Kim, State University of New York, Buffalo
Richard J. Sweeney, The McDonough School of
Business
Many stock exchanges have daily
price limits for individual stocks.
The effects of these price limits are little understood, especially for
price revelation and thus resource allocation. This paper models
and tests how price limits may induce an informed investor to shift
part
or all of her profit-motivated trades until the next day, thus
retarding
the spread of information. The model implies these delays
are
particularly
likely if the current price is near, but the equilibrium price is
substantially
beyond, today’s limit. In a series of tests on daily open, close,
high, low and limit prices from the Taiwan Stock Exchange, results are
consistent with the model; empirical results support the view both that
informed investors’ trades play a major role in price revelation and
that
price limits importantly delay price revelation.
Pitfalls
in Cross-Section Studies with Integrated Variables:
Procedures
for Valid Studies
Cross-section finance-study variables
should be, but never
are, tested for integration. This omission can have severe
consequences. Two
cases are analyzed. First, a stationary variable is regressed on an
integrated
variable. The integrated regressor may enter significantly, if it is
related to
a stationary regressor in the true relationship, but the estimated
coefficient’s size and sign are wholly unreliable. Resolving this
specification
problem requires unit-root tests for all variables. If a regressor is
integrated, a related stationary variable should be used instead.
Differencing
the integrated regressor sometimes is appropriate; frequently, however,
a
related categorical variable should be used. Second, both dependent and
explanatory variables are integrated. OLS slope estimates and t-values
have
standard properties; the time-series “spurious regression” problem does
not
arise. Finding a relationship raises further questions, however.
Cointegration
tests are required: Cointegration requires investigating implied profit
opportunities; lack of cointegration requires searching for an omitted
integrated variable.
Equivalent Valuations in Cash Flow and
Accounting Models
Residual
Income and Free Cash Flow models' equity valuations are equivalent if
(a) the
models’ discount rates jointly satisfy the Modigliani and Miller (1958)
condition which relates discount rates for levered equity, unlevered
equity,
tax savings and debt, and (b) forecasts of the two models’ variables
jointly
satisfy the income statement and balance sheet identities. Past
discussions
fail by ignoring or misusing (a). Further, past discussions focus on
use of pro
formas; pro formas automatically impose (b), but often are heavily
judgmental.
Any forecast method that imposes (b) is acceptable, however, whether
judgmental
methods are used or not; an example is forecasts based on regressions
constrained to satisfy the income statement and balance sheet
identities.
Researchers typically base
levered-discount rates on Modigliani
and Miller (1958, 1963). This paper shows that MM’s key assumption,
value
additivity, implies both the familiar MM rates and a second set of
discount
rates, Single Period Value Additivity rates. MM rates are found by
applying
value additivity to the firm’s overall value. SPVA rates are found by
applying
value additivity to each period’s financial flows. Both sets of rates
give
correct results when applied to the entire dividend stream. For proper
subsets
of the stream, as required for many capital-budgeting and valuation
issues, MM
rates give incorrect results.
The portfolio manager, without superior
insight, changes the
risky-portfolio weight in inverse proportion to the portfolio’s excess
return,
giving the weight a unit root. The manager is evaluated by a quadratic
regression
of the portfolio’s rate of return on the market. From simulations, the
manager
may appear to beat the market; in a base-case, the probability is
approximately
0.50 that the squared-market coefficient is significantly positive at
the 10%
level in a one-tail test. With observable portfolio weights,
conventional
unit-root tests can detect the spurious results. With unobservable
weights,
cusum-squared tests and recursive parameter estimates may detect
spurious
results for the squared-market coefficient.
Building a European Union
Constitution:
Lessons
from United
States History
Richard J. Sweeney
1. Introduction: Constitution-Making for the
Great Federations
2.
Allocating Power Between Federal and State Governments: Some Lessons
from Writing the United States Constitution
Appendix
Chapters 2 and 6: Influences on the Founders
and Framers
3. German-French Dominance in the European Union
Council
Appendix
to Chapter 3: Voting Power in the U.S.
Senate and House
4. “Constitutional Settlements” and Legitimacy
5.
Creeping Federalization: Increases in Federal Power in The United
States and The European Union
Appendix
to Chapter 6: Timeline of Events in the
American Revolution
7. Secession
and Expulsion: Lessons for the EU
from United States History,
1789
– 1861
Bibliography
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