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AbstractWhile public service motivation theory suggests that public sector employees have higher levels of intrinsic motivation, average pay levels in the public sector are not lower, so public sector employees also value financial incentives. We investigate the relationship of financial incentives with effort (measured with unpaid overtime) for public versus private sector employees using a UK sample. Bonuses are used much less in the public sector, but their relationship with effort is not different between sectors. Public sector employees exert more effort when base pay is higher and do so to a somewhat higher extent than private sector employees. However, public sector employees increase effort more when effort is an important promotion criterion and when perceived job security is higher. Thus, implicit incentives resulting from being in a secure job and developing in that job are more effective for public sector employees than for private sector employees.

PurposeThe profitability of individual customers can show substantial variation, both in money amounts and in margins (percentages). The literature suggests that larger customers have a higher customer profitability margin: a dollar in revenue from a large customer generates more profit than a dollar in revenue from a small customer. The purpose of this paper is to explore the relationship between customer size and the customer profitability margin.Design/methodology/approachDraws up a model with five variables (customer size, product margin, exchange efficiency, support, customer profitability margin) and hypothesizes the relationships between the variables. Uses LISREL to test the relationships on a database from a business‐to‐business setting.FindingsThe relationship between customer size and customer profitability margin is not direct, but runs through other variables, mainly exchange efficiency. It is not the result of larger customers paying higher product margins or having fewer customer support demands.Research limitations/implicationsAdds to the empirical literature on customer profitability. Ideally, this would be done using panel data rather than the cross‐sectional data used in this paper.Practical implicationsProfitability data at the level of individual customers provide useful insights. Customer size as such is not a driver of the customer profitability margin. Identify the trade‐offs between customer size, product margins (discounts), support demands, and exchange costs that ultimately lead to customer profitability.Originality/valueAdds to the empirical literature on customer profitability and offers practical implications for managing customer relationships.