This paper models the attention allocation of portfolio investors. Investors choose the composition of their information subject to an information flow constraint. Given their expected investment strategy in the next period, which is to hold a diversified portfolio, in equilibrium investors choose to observe one linear combination of asset payoffs as a private signal. When investors use this pr...

Resum The optimum portfolio selection for an investor with particular preferences was proven to lie on the normalized efficient frontier between two bounds defined by the Ballestero (1998) bounding theorem. A deeper understanding is possible if the decision-maker is provided with visual and quantitative techniques. Here, we derive useful insights as a way to support investor?s decision-making t...

Most existing portfolio choice models ignore the prevalent periodic market closure and the fact that market volatility is significantly higher during trading periods. We find that market closure and the volatility difference across trading and nontrading periods significantly change optimal trading strategies. In addition, we numerically demonstrate that transaction costs can have a first order...

Funding agencies and large public scientific institutions are increasingly using the term “research portfolio” as a means of characterising their research. While portfolios have long been used as a heuristic for managing corporate R&D (i.e., R&D aimed at gaining tangible economic benefits), they remain ill-defined in a science policy context where research is aimed at achieving societal outcome...

В работе излагаются особенности влияния длины инвестиционного горизонта на выбор инвестором оптимального для себя портфеля. Приводятся условия, при которых неэффективные портфели для однопериодного случая становятся эффективными с увеличением инвестиционного горизонта. Сравниваются два различных подхода к описанию предпочтений инвестора при выборе портфеля. Один из подходов основывается на крив...

We solve the problem of pricing and optimal exercise of American call-type options in markets which do not necessarily admit an equivalent local martingale measure. This resolves an open question proposed by Fernholz and Karatzas [Stochastic Portfolio Theory: A Survey, Handbook of Numerical Analysis, 15:89168, 2009].

The joint existence of a lender of last resort and of a stock market is usually considered the sign of a developed financial infrastructure. This paper analyzes whether a securities market may play a role similar to that of a lender of last resort by being of assistance to a bank, which faces possible liquidity shortages. We examine which of these two institutions best prevents a bank’s liquidi...

The estimation of the conceptual distance between patents is a critical issue for Computer-Aided patent portfolio analysis systems, an emerging class of computer tools for supporting R&D analyses and decisions, patent infringement risk evaluation, technology forecasting. The aim of the present work is the introduction of an original algorithm for patent comparison: since typical text analyses a...

The general equilibrium model with incomplete asset markets provides a uni ed framework for many problems in nance and macroeconomics. In its simplest version with only two time periods and a single physical commodity the model is ideally suited for the study of problems in cross sectional asset pricing and portfolio theory. In this paper we develop a homotopy algorithm to approximate equilibri...

Some online advertising offers pay only when an ad elicits a response. Randomness and uncertainty about response rates make showing those ads a risky investment for online publishers. Like financial investors, publishers can use portfolio allocation over multiple advertising offers to pursue revenue while controlling risk. Allocations over multiple offers do not have a distinct winner and runne...