Let X ∈ R denote a random stock market return vector, where Xj is the value of a one unit investment in stock j at the end of the trading day. We require that Xj ≥ 0 for j = 1, 2, . . . , m, that is, an investor cannot lose more than the invested capital. Let b, bj ≥ 0, ∑m j=1 bj = 1, denote a portfolio, that is, an allocation of investor’s capital across the investment alternatives. Let B deno...

Large amounts of resources have been, and will continue to be, invested in information technology (IT).The current paper establishes an integrative model of the impact of IT investment announcements on firm market valueby reviewing and analyzing several papers of empirical research. The impact factors are divided into four parts:IT investment characteristics, firm characteristics, competitive e...

Predictability of financial time series (FTS) is a well-known dilemma. A typical approach to this problem is to apply a regression model, built on the historical data and then further extend it into the future. If however the goal is to support or even make investment decisions, regression-based FTS predictions are inappropriate as on top of being uncertain and unnecessarily complex, they requi...

First, the stage in the demographic transition. Since around the mid-1960s, lower EME fertility rates have meant lower dependency ratios, which has tended to boost saving, and also a rise in the working-age population, which has tended to boost investment. The transition has worked out as predicted in some countries but not in others. In particular, in the aftermath of crises (eg Asia in the la...

This paper discusses the use of fuzzy logic and modeling as a decision making support for long-term investment decisions on financial markets. A simple model is proposed to calculate recommendations for the investors. This research required thorough analysis of historical data that lead to discovery of interesting dependencies between the Dow Jones index, currency pairs, oil price and the VIX v...

This paper discusses the use of fuzzy logic and modeling as a decision making support for long-term investment decisions in financial markets. A simple model is proposed to calculate recommendations for investors. This research required thorough analysis of historical data that lead to discovery of interesting dependencies between the Dow Jones index, currency pairs, oil price and the VIX volat...

This paper examines the effect of the labor-leisure choice on portfolio and consumption decisions over an individual’s life cycle. The model incorporates the fact that individuals may have considerable flexibility in varying their work effort (including their choice of when to retire). Given this flexibility, the individual simultaneously determines optimal levels of current consumption, labor ...

The discussion focuses on three themes. One is the divergence between positions of business associations and concerns of individual entrepreneurs regarding several determinants of investment. Another issue is under what conditions economic growth can be achieved under democracy; why market reforms have generated little private investment in many cases, and which government policies and politica...