Analysing customers' reviews and ratings for online food deliveries: A text mining approach

The purpose of this study was to explore the relationship between online reviews and ratings through text mining and empirical techniques. An Indian food delivery portal ( Zomato.com ) was used, where 50 restaurants on Presence Across Nation (PAN) basis were selected through stratified random sampling. A total of 2530 reviews were collected, scrutinized, and analysed. Using the NVivo software for qualitative analysis, seven themes were identified from collected reviews, out of which, the ‘delivery’ theme was explored further for identifying sub-themes. Linear regression modelling was used to identify the variables affecting delivery ratings and sentiment analysis was also performed on the identified sub-themes. Regression results revealed that hygiene and pricing (delivery subthemes) demonstrated lower delivery ratings. These variables can be established as indicators for restaurants and related online food delivery services to build their business model around them. Similarly, negative sentiments were observed in pricing and hygiene sub-themes. Restaurants and online food services can enhance hygiene levels of their food delivery process in order to receive higher delivery ratings. Similarly, pricing of food items can be modified such that customers are not deterred from ordering the items—food and ordering service do not become cost-prohibitive. This study devised a standardized methodology for analysing vast amounts of online user-generated content (UGC). Findings from this study can be extrapolated to other sectors and service industries such as, tourism, cleaning, transportation, hospitals and engineering especially during the pandemic.     

Can innovation shocks determine CO2 emissions (CO2e) in the OECD economies? A new perspective

ABSTRACT

This study has attempted to address prior knowledge gaps in the environmental economics literature by integrating the innovation shocks into the Environment Kuznets Curve (EKC) equation for twenty-six OECD economies using data from 1990 to 2014. Foreign direct investment (FDI), exports (EXP), renewable energy consumption (REC), and GDP per capita were included as control variables. The results from multiple empirical analyses indicated that positive shocks to innovation improve, but the negative shocks disrupt environmental quality. Data analyses also showed that a positive correlation exists between income per capita of OECD economies. From the negative coefficient of income per capita (squared) and the existence of a negative nexus between FDI and CO2e, both the EKC and the Pollution Halo Hypothesis (PHH) were confirmed in sampled economies, respectively. The paper offers empirical support for the favourable impacts of REC on the quality of the environment and calls for the adoption of innovation shocks as a policy instrument to formulate better environmental policies for a sustainable future.     

Neo-pluralism as a theoretical framework for understanding HRM in sub-Saharan Africa

This paper discusses the 'social' nature of employment management problems in sub-Saharan Africa (SSA). 'Applied' Western HRM is largely based on unitarist conceptions of organizational reality. Where conceptions suggest a 'stakeholder' perspective, they tend to follow orthodox formulations of pluralism. In that regard, notions of 'stakeholding' refer to the divergent internal organizational interests (mainly economic) of labour and management. In the SSA context, however, the broader social and moral issues of the wider community have a decisive influence on the employment relationship. And internal employment relations structures, such as trade unions, do not constitute the main representative channels for employee grievances. Consequently, established Western employment frames of reference do not represent suitable theoretical frameworks for analysing all the relevant social factors that influence the SSA employment relationship. This paper proposes a modified version of Ackers' (2002) 'neo-pluralist' theoretical framework as the basis for understanding and resolving some of issues involved in HRM in SSA. From this analysis, it proposes a model of HRM that attempts to institutionalize some elements of the 'African social system' into formal HRM policies and strategies.     

Does ethics improve stock market resilience in times of instability?

This paper compares the resilience of ethical (Islamic and socially responsible) indexes among five developed (US, UK, Japan, Canada, Australia) and three emerging markets (Brazil, India, South Africa) during the period following the 2008 subprime crisis. It relies on a multivariate CAPM-EGARCH model that accounts for sudden changes in volatility through the application of an iterated cumulative sums of squares (ICSS) algorithm on daily data over the sample period 2008–2014 to model time-varying volatility and ensure reliable estimates. The study confirms the lower systemic risk associated with Islamic indexes during the bearish period and reports that SRI, despite being more subject to systemic risk, offered higher alphas in highly integrated markets, while Islamic indexes performed better in less integrated ones. The evidence also reveals a very limited increase in the models’ predictability power from the integration of sudden changes in volatility into the EGARCH models during the full sample period. This limit is more marked during the bearish sub-period. Our findings have important implications for international investment and portfolio diversification perspectives in times of financial downturn.     

Optimum allocation in multivariate stratified random sampling with overhead cost

The problem of allocating the sample numbers to the strata in multivariate stratified surveys, where, apart from the cost involved in enumerating the selected individuals in the sample, there is an overhead cost associated with each stratum, has been formulated as a non-linear programming problem. The variances of the posterior distributions of the means of various characters are put to restraints and the total cost is minimized. The main problem is broken into subproblems for each of which the objective function turns out to be convex. When the number of subproblems happens to be large an approach has been indicated for obtaining an approximate solution by solving only a small number of subproblems.     

Changes in the Public Accounts Committee of a Less Developed Democratic Country: A Field Study

This paper complements prior studies on the public accounts committees (PACs) by considering the notions of ‘agency’ and ‘structure’ of institutional theory in tandem in understanding the changes in structures and activities of the PAC of a less‐developed democratic country – Bangladesh. While prior studies examined ‘external’ institutional pressures on the development and operation of the PAC in various settings, the role of internal and external institutional agents in this context has not been their primary focus. Our empirical evidence from a qualitative field study indicates that over the past two decades, Bangladesh's PAC underwent significant changes to its internal governance structures and administrative processes. While these changes were indirectly driven by pressures from international donor agencies, PAC members and the national audit office played a key role as institutional agents in initiating and institutionalising the changes in PAC governance and operation.     

Environmental Implications of Agricultural Externality: Policy for Socially Optimal Output

Journal of Quantitative Economics - Agriculture externality is caused not only by the presence of a hydrological contamination (a state variable) but also by the method of application of...     

The influence of service orientation discrepancy between managers and employees on employees’ affective outcomes

This study attempted to relate service orientation discrepancy (SOD) between employees and managers to employees’ affective reactions [role conflict (RC), role ambiguity (RA), job satisfaction (JS), and organizational commitment (OC)] in the restaurant industry. The findings of the study indicate that there is a SOD between managers and employees; employees saw themselves as more enthusiastic and less bureaucratic than managers. When this SOD was correlated with employee outcomes such as RC, RA, JS, and OC, the results indicated that SOD had a direct effect on RC, JS and OC. SOD also had indirect effects on JS, and OC through RC and RA. RC had a direct effect on JS and an indirect effect on OC. RA had a direct effect on JS. Finally, JS had a direct effect on OC.     

Intertemporal substitution in import demand and the role of habit formation: an application of Euler equation approach for Pakistan

Introduction

The study examines the importance of intertemporal substitution in import demand considering the role of habit formation. A two-goods version of the permanent income model is used in which time-non-separability in consumers’s preferences is assumed. The model is estimated using annual data for Pakistan at disaggregated level covering the period from 1977 to 2017.

Objectives

The objective of the study is to estimate elasticities of substitution along with parameters of habit formation for consumption goods at a disaggregated level.

Method

The study employs co-integration for the estimation of parameters of elasticities of substitution and generalized method of moments (GMM) for the estimation of the parameters of habit formation from Euler equations.

Findings

The estimates of intertempral elasticity of substitution suggest that the nature of commodity group (necessity/luxury) plays an important role when consumers are making intertemporal choices. Moreover, the study finds that intratemporal elasticity of substitution is larger than intertempral elasticity of substitution in almost all cases in Pakistan, suggesting that imported and domestic goods are best described as substitutes in Edgeworth-Pareto sense. In addition, the inclusion of habit formation delivers results with plausible signs and the habit formation process seems significant for certain commodity groups including tea, beverages, tobacco products and drugs.

Conclusion

The study concludes that there is a possibility of crowding out effect on domestic consumption and the depreciation of local currency may improve Pakistan’s balance of trade.