Nowadays, when companies are dealing with severe global competition, they are making serious investments in Customer Relationship Management (CRM) strategies. One of the cornerstones in CRM is customer churn prediction, the practice of determining a mathematical relation between customer...

This paper analyzes the reverse causality between poverty and labor informality in the Dominican Republic, generating a profile that encompasses the socioeconomic and demographic factors of individuals to both poverty and labor informality. To that end, the National Labor Force Survey (Encuesta...

In this investigation, a verification list (“checklist”) of characteristics is constructed that allows to outline in a differentiated way the manifestation of the different forms of Violence Between Couples (VEP) in the home (Psychological, Economic, Physical and Sexual) that flourishes at...

This note develops a model of product differentiation that can be estimated using standard regression techniques and applies it to a panel data set of new car sales. The model allows for complex substitution patterns according to an overlapping nest structure that makes cars closer substitutes...

Differing attitudes towards environmental issues between men and women as policymakers may affect policies and actions. Accordingly, this research analyses the issue of the causal relationship between women politicians and the level of air pollution. The analysis tests for this in Italy,...

The study investigates the influence of intra-African trade on Africa's macroeconomic performance. To mitigate potential biases, the paper employs a two-step estimation technique (2SLS). In the first step, the paper uses Poisson pseudo maximum likelihood (PPML) to estimate the gravity model for...

We estimate schedules of declining discount rates for cost benefit analysis in the UK. We highlight the importance of model selection for this task and hence for the evaluation of long-term investments, namely climate change prevention and nuclear build.

Pretesting for exogeneity has become a routine in many empirical applications involving instrumental variables (IVs) to decide whether the ordinary least squares (OLS) or the IV-based method is appropriate. Guggenberger (2010) shows that the second-stage t-test – based on the outcome of a...

The properties of two goodness-of-fit measures are analyzed for the instrumental variables model. One measure is based on the two-step approach to IV estimation and is equal to the coefficient of determination in the second stage equation. This measure therefore measures the fit of a...

This paper puts forward a new instrumental variables (IV) approach for linear panel data models with interactive effects in the error term and regressors. The instruments are transformed regressors and so it is not necessary to search for external instruments. The proposed method asymptotically...