Stock (geology)

About: Stock (geology) is a research topic. Over the lifetime, 31009 publications have been published within this topic receiving 783542 citations.

A new database on human capital stock : sources, methodology and results

Abstract: The authors describe the techniques and data adopted for the construction of a new series of estimates of the stock of education in 85 countries over 28 years (1960-87). It covers all the important developing regions except the republics of the former Soviet Union. The International Economics Department (IEC) continues a well-established trend in growth research of using educational stock (measured as mean school years of education of the labor force) as a proxy for human capital. The series are built from enrollment data using the perpetual inventory method, adjusted for mortality. Estimates are corrected for grade repetition among school-goers and country-specific drop-out rates for primary and secondary students. Enrollment data series used start as far back as 1930 for most countries, and even earlier for others. This reduces the need for backward extrapolation of enrollments to provide the initial estimates of the investment inventory.

High-frequency Cross-correlation in a Set of Stocks

Abstract: The high-frequency cross-correlation existing between pairs of stocks traded in a financial market are investigated in a set of 100 stocks traded in US equity markets. A hierarchical organization of the investigated stocks is obtained by determining a metric distance between stocks and by investigating the properties of the subdominant ultrametric associated with it. A clear modification of the hierarchical organization of the set of stocks investigated is detected when the time horizon used to determine stock returns is changed. The hierarchical location of stocks of the energy sector is investigated as a function of the time horizon.

Do Sales–Price and Debt–Equity Explain Stock Returns Better than Book–Market and Firm Size?

Abstract: During the 1979–91 period, the sales–price ratio and the debt–equity ratio had greater explanatory power for stock returns than either the book–market value of equity ratio or the market value of equity. Furthermore, the sales–price ratio captures the role of the debt–equity ratio in explaining stock returns. Neither the book–market value of equity ratio nor the market value of equity has consistent explanatory power for stock returns, and the sales–price ratio is a more reliable explanatory factor.

Structural Incoherence and Stock Market Activity

Abstract: This paper argues that the efficiency of the price-setting process in the stock market is contingent on the coherence of a stock's position in the industry-based classificatory structure that guides valuation. While this structure helps investors interpret ambiguous economic news, it is imperfect because stocks vary in the extent to which they are coherently classified, as revealed by the stocks' position in the network of coverage by securities analysts. The main hypotheses are that incoherent stocks are traded more often because such stocks are more likely to be subject to differences in the interpretive models used to understand material information; and that both volume and volatility are higher for incoherent stocks because convergence on a common interpretation relies more heavily on self-recursive market dynamics. These hypotheses are validated via analyses of market activity in the aftermath of first-quarter earnings announcements for U.S.- based firms from 1995 to 2001. The results help reorient ...