Revista de Economía y Negocios

The main purpose of the study is to assess the determinants of procurement performance at Arba Minch University. In this study, the researcher tries to see the correlation between the independent variable (management style, organizational culture, Information Technology (IT) adaption, staff competency, stockholders commitment and records management) and dependent variable (performance of procurement with appropriate time, price, and quantity, quality, source, budget consumption, and contract management). The study assessed theoretical, empirical, and conceptual review of related literature. The research design was descriptive (frequency and percentage) and explanatory design (Pearson product-moment correlation and multiple linear regressions) analysis with the help of SPSS 20.0 software packages was used and also used mixed approaches (quantitative and qualitative research approach). The finding was assessed procurement performance strongly affected management style, staff competency, organization culture, stockholders commitment, IT adoption, and records management. The data gathering tools were primary and secondary data which were questioner and focus group discussion from 210 respondents using self-administered questionnaire and 57 interviewers and the final response rate was 90.16%. The correlation result (0.75) shows there is a strong correlation between the outcome variable and the predictor variable. The regression result (r2 =0.63) also shows predictor variables explain public procurement performance and except ICT adaption all predictor variables significant and high impact on performance and the reaming factors which account 0.36 which were unexplored variable affect procurement performance. The finding revealed that procurement performance was strongly affected by management style, staff competency, organization culture, stockholders' commitment, IT adoption, and records management. And the result of the finding shows in AMU there were to some extant problems in management style, staff competency, organization culture, stockholders' commitment, IT adoption, and records management which lead to less performance in public procurement.

The Korean Stock Exchange (KRX) is among the most rapidly growing markets in the world, and the Korean KOSPI 200 stock index option is among the most traded options contract. Not surprisingly, the KRX and related derivatives products have been attracting significant interest from investors and researchers alike. The KRX offers an excellent opportunity to examine the effects of individual investors. Most of the trading on the KRX is done by individuals as opposed to institutions. This paper examines behavioral tendencies of traders of the KOSPI 200 option contract. Findings show the KOPSI 200 index options contract is often mispriced and that the mispricing occurs most often after extreme downturns in the KRX. Traders exhibit cognitive recency biases, strong preferences for skewness, and often overreact to changes in the KRX spot market.

En este artículo, estudiamos la estrategia de retención e inversión en un modelo inconsistente en el tiempo para un problema de decisión óptima bajo el marco de un juego diferencial estocástico. La cartera de inversiones incluye activos de múltiples riesgos, cuyos rendimientos se supone que están correlacionados de manera variable en el tiempo y cambian cíclicamente. También se supone que las pérdidas por siniestros de las compañías de seguros y la inversión están correlacionadas entre sí. Las ecuaciones HJBI extendidas dan como resultado una solución para la parte de retención y una cartera óptima con asignaciones igualmente ponderadas de activos riesgosos, lo que se demuestra por primera vez teóricamente. Se propone un límite de control óptimo para monitorear y predecir el nivel óptimo de riqueza. Se espera que el modelo propuesto sea eficaz para tomar decisiones sobre estrategias de inversión y reaseguro, controlar y predecir la riqueza óptima en un entorno incierto. En particular, el modelo se puede aplicar fácilmente en el caso de una cartera de inversión de dimensiones muy altas.