Environmental studies and sciences (ESS), an inherently practical field, nonetheless demands greater attention to its theoretical assumptions as a necessary step toward continued intellectual and pedagogical development and real-world relevance. This need for theory arises from the status of ESS...

We adopted a restricted version of Source Differentiated Almost Ideal Demand System (RSDAIDS) to analyse the US import demand for fresh apples, apple juice and other processed apples after differentiating each type of apple by import origins. Seasonality and time trend variables were included in...