Search results

New asymptotic approximations are established for the Wald and t statistics in the presence of unknown but strong autocorrelation. The asymptotic theory extends the usual fixed-smoothing asymptotics under weak dependence to allow for near-unit-root and weak-unit-root processes. As the locality parameter that characterizes the neighborhood of the autoregressive root increases from zero to infinity, the new fixed-smoothing asymptotic distribution changes smoothly from the unit-root fixed-smoothing asymptotics to the usual fixed-smoothing asymptotics under weak dependence. Simulations show that the new approximation is more accurate than the usual fixed-smoothing approximation.

The manager of the 21st century is expected to succeed in an environment strongly characterized by unprecedented volatility, uncertainty, complexity, and ambiguity (VUCA). In fact, today’s business environment consists of contradictory pressure and tensions, where competitive advantage could be gained by ambidextrous activities. The concept of ambidexterity has already been discussed by many scholars, but still little is known about managerial practice and actions that are useful for finding the balance between the paradoxes that have been identified at that level. Although there are different tensions, dynamic and evolving according to the changes observed in the environment: more volatile, uncertain, complex, and ambiguous, the pressure to remain flexible and simultaneously maintain the plan of development, seems to be essential. In recent research studies, networking perspective is mentioned as one of areas worth exploring while analyzing the concept of ambidexterity. For that reason, the main goal of this chapter is to investigate if networking is one of the factors useful for managing ambidexterity. To gain deeper insight, we investigated further, searching for the factors essential for managing ambidexterity: we compared the research results between companies of different sizes to identify any regularities. We focused on ambidexterity reflected by managerial practice where stability/plans and flexibility are implemented simultaneously. We investigated 150 managers using paper-and-pencil interviewing. Our research results confirmed that networking could be one of the main approaches having an impact on ambidextrous activities. However, we cannot conclude that companies are obliged to apply a networking perspective to be ambidextrous, although it could be recommended. Further analysis of companies of different sizes revealed the relationship between ambidexterity and networking in case of small and large companies, and no relation in medium-sized enterprises.

Family businesses have several distinct features that distinguish them from other businesses. This aspect makes it imperative that scholars investigate issues with an additional focus on the interplay of family business dynamics. In this chapter, we explore the issues of power and corruption within family business, with the understanding that prior examinations of this phenomenon were primarily restricted to large public corporations that are not family owned. The key contribution of this chapter is to shed light on the dark side of family business, namely power enabled corruption. We do so by considering three dimensions that are unique to family firms, namely, ownership and control, generations, and governance. In particular, we highlight how these dimensions can facilitate corruption. It is possible that they may also challenge family business that try to detect, deter, and control corruption within their ranks. The lack of objective external evaluation, the ineffectiveness of internal checks, generational issues, family control, and the restricted nature of governance appear to contribute to exacerbating tensions that promote corruption becoming entrenched within family businesses. Following a case method approach, several illustrative examples of cases of power and corruption within family firms are provided, representing different geographic regions of the world, to showcase the widespread nature of this phenomenon. The three family business cases we illustrate (Grupo Odebrecht in Latin America, Sahara Group in South Africa and Foremost Maritime Group in China) represent multiple countries, continents, and geo-political frontiers. Each case illustrates how both corruption and power reinforce each other in family businesses. Implications of the magnifier effect of power on corruption in family business are discussed in terms of its impact, scale, and its enabling effect by providing a road map to corruption.

The kindergarten curriculum in mainland China has evolved through four periods and the current reform began in the end of 1980s. The reform aimed to transform kindergarten practice by shaping ideologies including respect for individual child, active learning, and play-based integrated curriculum. This review of research literatures shows that compared with the practice before the reform, many kindergarten teachers organize classrooms in learning centers, provide more play materials, pay time, and freedom for free play, and pay more attention to individuals. But indoor space organized in rice-seedling-bed model, teacher-led group instruction and teacher-controlled interactions are still often observed after three decades of reform efforts; there still exist great variations among kindergartens of different sponsoring bodies and in different regions. The problems resulted from the innate deficiencies of the top-down and value-priority reform, the conflicts between the advocated value and the traditional Chinese culture with emphasis on Ming-Fen, testing, and the value of children for the whole family and nation, and the unequal distribution of public resources decided by the educational institutions. Therefore, the curriculum reform is not a separate endeavor from other social changes, but a comprehensive and systematic change. To guarantee the success of the curriculum reform, the Chinese society needs cultural transformation and institutional reconstruction.

The malfunction variables of power stations are related to the areas of weather, physical structure, control and load behaviour. To predict temporal power failure is difficult due to their unpredictable characteristics. As high accuracy is normally required, the estimation of failures of short-term temporal prediction is highly difficult. This study presents a method for converting stochastic behaviour into a stable pattern, which can subsequently be used in a short-term estimator. For this conversion, K-means clustering is employed, followed by Long-Short-Term Memory (LSTM) and Gated Recurrent Unit (GRU) algorithms are used to perform the Short-term estimation. The environment, the operation and the generated signal factors are all simulated using mathematical models. Weather parameters and load samples have been collected as part of a data set. Monte-Carlo simulation using MATLAB programming has been used to conduct experimental estimation of failures. The estimated failures of the experiment are then compared with the actual system temporal failures and found to be in good match. Therefore, for any future power grid, there is a testbed ready to estimate the future failures.

The increasing accumulation of synthetic plastic waste in oceans and landfills, along with the depletion of non-renewable fossil-based resources, has sparked environmental concerns and prompted the search for environmentally friendly alternatives. Biodegradable plastics derived from lignocellulosic materials are emerging as substitutes for synthetic plastics, offering significant potential to reduce landfill stress and minimise environmental impacts. This study highlights a sustainable and cost-effective solution by utilising agricultural residues and invasive plant materials as carbon substrates for the production of biopolymers, particularly polyhydroxybutyrate (PHB), through microbiological processes. Locally sourced residual materials were preferred to reduce transportation costs and ensure accessibility. The selection of suitable residue streams was based on various criteria, including strength properties, cellulose content, low ash and lignin content, affordability, non-toxicity, biocompatibility, shelf-life, mechanical and physical properties, short maturation period, antibacterial properties and compatibility with global food security. Life cycle assessments confirm that PHB dramatically lowers CO₂ emissions compared to traditional plastics, while the growing use of lignocellulosic biomass in biopolymeric applications offers renewable and readily available resources. Governments worldwide are increasingly inclined to develop comprehensive bioeconomy policies and specialised bioplastics initiatives, driven by customer acceptability and the rising demand for environmentally friendly solutions. The implications of climate change, price volatility in fossil materials, and the imperative to reduce dependence on fossil resources further contribute to the desirability of biopolymers. The study involves fermentation, turbidity measurements, extraction and purification of PHB, and the manufacturing and testing of composite biopolymers using various physical, mechanical and chemical tests.

This chapter focuses on testing optimal capital structure theory: The role of intervening variable debt to equity ratio (DER) on the influence of the financial performance, Ownership Structure of Independent Board of Commissioners (IBCO), Audit Committee (ACO), and Institutional Ownership on Firm Value. The research design was explanatory research using path analysis. Using purposive sampling, 61 manufacturing companies, observation period from 2014 to 2018 with 286 N samples. The research novelty empirically can prove the role of intervening variable DER on the effect of return on assets (ROA) on firm value and shows the market response to the ROA is fully reflected by DER, indicating the existence of an optimal capital structure. The role of DER on the effect of ROE and IBCO on firm value is a partial mediation with the inverse direction. This phenomenon shows that the mechanism of forming a balance between the responses of investors and creditors relates to debt financing.

Mainstream pornography is popular, freely accessible, and infused with themes of male dominance, aggression, and female subservience. Through depicting sex in these ways, mainstream pornography has the potential to influence the further development of harmful sexual scripts that condone or endorse violence against women and girls. These concerns warrant the adoption of a harms-based perspective in critical examinations of pornography's influence on sexual experiences. This chapter reports on findings from interviews with 24 heterosexual emerging adults living in Aotearoa/New Zealand about how pornography has impacted their lives. Despite a shared awareness among participants of mainstream pornography's misogynistic tendencies, and the potential for harm from those displays, men's and women's experiences were profoundly gendered. Men's reported experiences were often associated with concerns about their own sexual behaviors, performances, and/or abilities. Conversely, women's experiences were often shaped by how pornography had affected the way that men related to them sexually. Their experiences included instances of sexual coercion and assault which were not reported by the men. These findings signal the need for a gendered lens, situated within a broader harms-based perspective, in examinations of pornography's influence.