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Discussion Paper
On Tobin's multiperiod portfolio theorem
Journal Article
U.S. international transactions in 1989
Journal Article
U.S. international transactions in 1996
After stabilizing in 1995, the U.S. current account deficit widened in 1996 to $165 billion. The deficit increased sharply in the first three quarters of the year, but, because of strong export growth, narrowed significantly in the fourth quarter. The widening of the deficit by $17 billion was the net result of moderate-to-strong growth in all the key components of the current account: exports and imports of goods and services, income from U.S. and foreign portfolio and direct investments, and net unilateral transfers.
Working Paper
On the inverse of the covariance matrix in portfolio analysis
The goal of this study is the derivation and application of a direct characterization of the inverse of the covariance matrix central to portfolio analysis. As argued below, such a specification of the inverse, in terms of a few primitive constructs, helps clarify the determinants of such key concepts as (1) the optimal holding of a given risky asset, (2) the slope of the risk-return efficiency locus faced by the individual investor, and (3) the pricing of risky assets in the Capital Asset Pricing Model. The two building blocks of the inverse turn out to be the non-diversifiable part of each ...
Working Paper
On the inverse of the covariance matrix in portfolio analysis
The goal of this study is the derivation and application of a direct characterization of the inverse of the covariance matrix central to portfolio analysis. As argued below, such a specification, in terms of a few primitive constructs, provides new and illuminating expressions for such key concepts as the optimal holdings of a given risky asset and the slope of the risk-return efficiency locus faced by the individual investor. The building blocks of the inverse turn out to be the regression coefficients and residual variance optained by regressing the asset's excess return on the set of ...
Working Paper
Exchange rates and foreign direct investment: a note
In "Exchange Rates and Direct Investment: An Imperfect Capital Markets Approach," Kenneth Froot and Jeremy Stein [1991] develop a new finance-based theory to answer an old question--the relationship, if any, between the flow of foreign direct investment and the exchange rate. Their theory, based on the possibility that a foreign firm's borrowing opportunities for financing a U.S. acquisition may be a function of its net worth in dollars, implies a negative relationship between a dollar appreciation and direct investment inflows into the United States. Empirically, the authors find ...