Estimation of consumption intensity of African indigenous vegetables (AIVs) is important to understand how their utilization can be enhanced at the household level. The study evaluated consumption intensity of leafy AIVs using the zero-inflated negative binomial regression model. A multistage...

The theoretical population ecology constructs of commensalism, parasitism, and amensalism are applied in an analysis of the Knowledge Cluster Initiative (KCI), a unique social experiment establishing university-business-government alliances for knowledge-intensive innovative clusters in Japan....

Technology, digital advances, and social media are increasingly used to facilitate and influence online consumer purchasing behavior. Growth at the intersection of e-commerce, social networking usage, and functionality has given rise to the social commerce phenomenon. Social commerce sites allow...

The paper analyses the relationship between digitalisation and sustainability strategies at the firm level. In a first step, operational definitions of digitalisation and sustainability allowing the development of fitting empirical indicators are discussed. The possible technical and social...

We show how the rootogram - a graphical tool associated with the work of J. W. Tukey and originally used for assessing goodness of fit of univariate distributions - can help to diagnose and treat issues such as overdispersion and/or excess zeros in regression models for count data. Two empirical...

Feed-in tariffs under the Renewable Energy Sources Act, the so - called Erneuerbare - Energien - Gesetz (EEG), have triggered a massive expansion of electricity from renewable energy sources in Germany over the last decade. The increase in non-competitive renewable power generation though went...

Applications of zero-inflated count data models have proliferated in empirical economic research. There is a downside to this development, as zero-inflated Poisson or zero-inflated Negative Binomial Maximum Likelihood estimators are not robust to misspecification. In contrast, simple Poisson...

This contribution investigates the role of education in domestic terrorism for 133 countries between 1984 and 2007. The findings point at a nontrivial effect of education on terrorism. Lower education (primary education) tends to promote terrorism in a cluster of countries where the...