This paper develops and tests a new model for multiple-unit adoptions of durable goods based on the diffusion modeling tradition. Multiple-unit adoptions are a major component of sales for many consumer durable product categories. For instance, sales of multiple-unit adoptions for televisions have been high than both first adoptions and replacement purchases since 1977, while for automobiles th...

OBJECTIVES To describe sales and sales patterns of veterinary antimicrobial agents in 25 European Union (EU)/European Economic Area (EEA) countries for 2011. METHODS Data on the sales of veterinary antimicrobial agents from 25 EU member states and EEA countries for 2011 were collected at package level (name, formulation, strength, pack size, number of packages sold) according to a standardize...

Adaptive base stock policy is a well-known tool for managing inventories in non-stationary demand environments. This paper presents empirical tests of this policy using aggregate, firmlevel data. First, we extend a single-item adaptive base stock policy in previous literature to a multi-item case. Second, we transform the policy derived for the multi-item case to a regression model that relates...

Dykema (2000) presents several statistics that online retail sales are projected to grow from $45 billion in 2000, or 1.5% of total retail sales, to $269 billion in 2005, or 7.8% of total retail sales for that year. Besides this substantial growth in on-line sales, consumers increasingly rely on information collected on-line to research a lot of purchases that are concluded over traditional "br...

Motivating salespersons is one of the most important aspects of sales force management. The prevalent sales force motivation research stream relies essentially on Vroom’s expectancy theory. In spite of its widespread use, this theory is shown to present a number of shortcomings when applied to many sales force situations. The purpose of this paper is to outline a mathematical formulation of a s...

BACKGROUND In the US, denormalizing tobacco use is key to tobacco control; less attention has been paid to denormalizing tobacco sales. However, some localities have placed limits on the number and type of retailers who may sell tobacco, and some retailers have abandoned tobacco sales voluntarily. Understanding community norms surrounding tobacco sales may help accelerate tobacco denormalizatio...

BACKGROUND This study evaluates changes in sales of non-alcoholic beverages in Jamie's Italian, a national chain of commercial restaurants in the UK, following the introduction of a £0.10 per-beverage levy on sugar-sweetened beverages (SSBs) and supporting activity including beverage menu redesign, new products and establishment of a children's health fund from levy proceeds. METHODS We used ...

The study was carried out to provide empirical evidence on technical efficiency of maize production in Nigeria using parametric and non-parametric approaches. The study employed annual secondary data on maize production in Nigeria from 1971 to 2010.Stochastic Frontier Analysis (SFA) and Data Envelopment Analysis (DEA) were used to estimate the technical efficiency of maize production. The resul...

This article reports the third-year findings of a longitudinal evaluation in England of Success for All (SFA), a comprehensive literacy program. Eighteen SFA schools across England and 18 control schools, matched on prior achievement and demographics, were included in this quasi-experimental study. The results of hierarchical linear modeling analysis reveal a statistically significant positive ...