286,968 research outputs found
Library stock verification: a ritual and an occupational hazard
No full textExplains the sensitive, controversial stock verification as one of the occupational hazards and a postmortem, emphasises need for clarity of objectives and procedures regarding stock verification and responsibilities of loss, points out that the cost of stock verification often far exceeds the benefits, highlights norms and procedures of stock verification for Government of India institutions, discusses some advantages and various methods and procedures of physical verification, put forth precautionary measures to be taken against loss and mutilation of library documents, analyses the issue of responsibility of loss and ways of resolving the conflict of responsibility, presents the procedure for write-off of reasonable loss, finally concludes by stressing the need for rational and updated rules and procedures about stock verification, responsibility of loss and limits to write-off loss as well as vital role of professional bodies in this direction
RESTLESS BANDIT MARGINAL PRODUCTIVITY INDICES II: MULTIPROJECT CASE AND SCHEDULING A MULTICLASS MAKE-TO-ORDER/-STOCK M/G/1 QUEUE
No full textThis paper develops a framework based on convex optimization and economic ideas to formulate and solve approximately a rich class of dynamic and stochastic resource allocation problems, fitting in a generic discrete-state multi-project restless bandit problem (RBP). It draws on the single-project framework in the author´s companion paper “Restless bandit marginal productivity indices I: Single-project case and optimal control of a make-to-stock M/G/1 queue”, based on characterization of a project´s marginal productivity index (MPI). Our framework significantly expands the scope of Whittle (1988)´s seminal approach to the RBP. Contributions include: (i) Formulation of a generic multi-project RBP, and algorithmic solution via single-project MPIs of a relaxed problem, giving a lower bound on optimal cost performance; (ii) a heuristic MPI-based hedging point and index policy; (iii) application of the MPI policy and bound to the problem of dynamic scheduling for a multiclass combined MTO/MTS M/G/1 queue with convex backorder and stock holding cost rates, under the LRA criterion; and (iv) results of a computational study on the MPI bound and policy, showing the latter´s near-optimality across the cases investigated.
Quest: A Journal of Undergraduate Student Research
No full textThe world of finance incorporates large volumes of information to speculate the approximate value of a company?s stock within the near future. Additionally, analysts attempt to determine the overall status of an economy using figure such as job growth, GDP, and spending. It was postulated that measuring the changes in goods shipment volume could predict the United States economic status as compared to the Standard and Poor?s 500 index performance. A panel of experts were used to evaluate industry sectors as to their impact on the S&P 500. This data was incorporated with CSX shipping volumes within those industries using the Analytical Hierarchy Process (AHP), Guiasu, and Yen fuzzy set mathematics to predict percentage changes of the S&P 500 over each quarter. It was discovered that the S&P 500 is actually an indicator of how the railroad industry will perform approximately a quarter later.49-64 (Paper 3)
Restless bandit marginal productivity indices I: singleproject case and optimal control of a make-to-stock M/G/1 queue
No full textThis paper develops a framework based on convex optimization and economic ideas to formulate and solve by an index policy the problem of optimal dynamic effort allocation to a generic discrete-state restless bandit (i.e. binary-action: work/rest) project, elucidating a host of issues raised by Whittle (1988)Žs seminal work on the topic. Our contributions include: (i) a unifying definition of a projectŽs marginal productivity index (MPI), characterizing optimal policies; (ii) a complete characterization of indexability (existence of the MPI) as satisfaction by the project of the law of diminishing returns (to effort); (iii) sufficient indexability conditions based on partial conservation laws (PCLs), extending previous results of the author from the finite to the countable state case; (iv) application to a semi-Markov project, including a new MPI for a mixed longrun-average (LRA)/ bias criterion, which exists in relevant queueing control models where the index proposed by Whittle (1988) does not; and (v) optimal MPI policies for service-controlled make-to-order (MTO) and make-to-stock (MTS) M/G/1 queues with convex back order and stock holding cost rates, under discounted and LRA criteria
RESTLESS BANDIT MARGINAL PRODUCTIVITY INDICES I: SINGLEPROJECT CASE AND OPTIMAL CONTROL OF A MAKE-TO-STOCK M/G/1 QUEUE
No full textThis paper develops a framework based on convex optimization and economic ideas to formulate and solve by an index policy the problem of optimal dynamic effort allocation to a generic discrete-state restless bandit (i.e. binary-action: work/rest) project, elucidating a host of issues raised by Whittle (1988)´s seminal work on the topic. Our contributions include: (i) a unifying definition of a project´s marginal productivity index (MPI), characterizing optimal policies; (ii) a complete characterization of indexability (existence of the MPI) as satisfaction by the project of the law of diminishing returns (to effort); (iii) sufficient indexability conditions based on partial conservation laws (PCLs), extending previous results of the author from the finite to the countable state case; (iv) application to a semi-Markov project, including a new MPI for a mixed longrun-average (LRA)/ bias criterion, which exists in relevant queueing control models where the index proposed by Whittle (1988) does not; and (v) optimal MPI policies for service-controlled make-to-order (MTO) and make-to-stock (MTS) M/G/1 queues with convex back order and stock holding cost rates, under discounted and LRA criteria.
Stock returns and foreign investment in Brazil
No full textWe examine the relationship between stock returns and foreign investment in Brazil, and find that the inflows of foreign investment boosted the returns from 1995 to 2005. There was a strong contemporaneous correlation, although not Granger-causality. Foreign investment along with the exchange rate, the influence of the world stock markets, and country risk can explain 73 percent of the changes that occurred in the stock returns over the period. We also find that positive feedback trading played a role, and that the market promptly assimilated new information.stock returns; foreign investment; Brazilian economy
Restless bandit marginal productivity indices II: multiproject case and scheduling a multiclass make-to-order/-stock M/G/1 queue
No full textThis paper develops a framework based on convex optimization and economic ideas to formulate and solve approximately a rich class of dynamic and stochastic resource allocation problems, fitting in a generic discrete-state multi-project restless bandit problem (RBP). It draws on the single-project framework in the author's companion paper "Restless bandit marginal productivity indices I: Single-project case and optimal control of a make-to-stock M/G/1 queue", based on characterization of a project's marginal productivity index (MPI). Our framework significantly expands the scope of Whittle (1988)'s seminal approach to the RBP. Contributions include: (i) Formulation of a generic multi-project RBP, and algorithmic solution via single-project MPIs of a relaxed problem, giving a lower bound on optimal cost performance; (ii) a heuristic MPI-based hedging point and index policy; (iii) application of the MPI policy and bound to the problem of dynamic scheduling for a multiclass combined MTO/MTS M/G/1 queue with convex backorder and stock holding cost rates, under the LRA criterion; and (iv) results of a computational study on the MPI bound and policy, showing the latter's near-optimality across the cases investigated
The Interplay Between the Thai and Several Other International Stock Markets
No full textThe paper analyses the effect of various international stock market price indices and some relevant macroeconomic variables on the Thai stock market price index, using a GARCH-M model and monthly data from January 1988 to December 2004. It is found, inter alia, that (a) changes in stock market returns in Singapore, Malaysia and Indonesia in the pre-1997 Asian crisis, and changes in Singapore, the Philippines and Korea in the post-1997 era instantaneously influenced returns in the Thai stock market; (b) changes in the price of crude oil negatively impacted on the Thai stock market only in the pre-Asian crisis period; (c) volatility clustering (i.e. ARCH and GARCH effects) as well as a GARCH-M model were statistically significant only in the pre-1997 era; and (d) stock markets outside the region had no significant immediate impact on monthly aggregate returns in the Thai stock market.Stock market; conditional volatility; macroeconomic variables; GARCH; Thailand
Determinants of Stock Market Prices in Namibia
No full textThis paper investigates the macroeconomic determinants of stock market prices in Namibia. The investigation was conducted using a VECM econometric methodology and revealed that Namibian stock market prices are chiefly determined by economic activity, interest rates, inflation,money supply and exchange rates. An increase in economic activity and the money supply increases stock market prices, while increases in inflation and interest rates decrease stock prices. The results suggest that equities are not a hedge against inflation in Namibia, and contractionary monetary policy generally depresses stock prices. Increasing economic activity promotes stock market price developmentstock market prices; arbitrage pricing theory; cointegration; impulse reponses; Namibia
Stock market development and financial intermediaries : stylized facts
No full textWorld stock markets are booming. Between 1982 and 1993, stock market capitalization grew from 10 trillion, an average 15 percent a year. A disproportionate amount of this growth was in emerging stock markets, which rose from 3 percent of world stock markets capitalization to 14 percent in the same period. Yet there is little empirical evidence about how important stock markets are to long-term economic development. Economists have neither a common concept nor a common measure of stock market development, so we know little about how stock market development affects the rest of the financial system or how corporations finance themselves. The authors collected and compared many different indicators of stock market development using data on 41 countries from 1986 to 1993. Each indicator has statistical and conceptual shortcomings, so they used different measures of stock market size, liquidity, concentration, and volatility, of institutional development, and of international integration. Their goal: to summarize infromation about a variety of indicators for stock market development, in order to facilitate research into the links between stock markets, economic development, and corporate financing decisions. They highlight certain important correlations: (i) In the 41 countries they studied, there are enormous cross-country differences in the level of stock market development for each indicator. The ratio of market capitalization to the gross domestic product (GDP), for example, is greater than 1 in five countries and less than 0.10 in five others. (ii) There are intuitively appealing correlations among indicators. For example, big markets tend to be less volatile, more liquid, and less concentrated in a few stocks. Internationally integrated markets tend to be less volatile. And institutionally developed markets tend to be large and liquid. (iii) The three most developed markets are in Japan, the United Kingdom, and the United States. The most underdeveloped markets are in Colombia, Nigeria, Venezuela, and Zimbabwe. Malaysia, the Republic of Korea, and Switzerland seem to have highly developed stock market, whereas Argentina, Greece, Pakistan and Turkey have underdeveloped in richer countries, but many markets commonly labeled"emerging"(for example, in Korea, Malaysia,and Thailand) are systematically more developed than markets commonly labeled"developed"(for example, in Australia, Canada, and many European countries). (iv) Between 1986 and 1993, some markets developed rapidly in size, liquidity, and international integration. Indonesia, Portugal, Turkey, and Venezuela experienced explosive development, for example. Case studies on the reasons for (and economic consequences of) this rapid development could yield valuable insights. (v) The level of stock market development is highly correlated with the development of banks, nonbank financial institutions (finance companies, mutual funds, brokerage houses), insurance companies, and private pension funds.Markets and Market Access,Economic Theory&Research,Health Economics&Finance,Payment Systems&Infrastructure,Banks&Banking Reform,Economic Theory&Research,Health Economics&Finance,Access to Markets,Markets and Market Access,Banks&Banking Reform
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