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Examines new directions company health and safety programmes are taking. Discusses new dealings with Health Maintenance Organizations (HMOs) which companies employ, stress management, and wellness or preventative health programmes. Considers employee participation in the implementation of safety programmes and various forms of safety incentives.

This paper aims to apply the Product Life Cycle (PLC) and Product Evolutionary Cycle (PEC) frameworks to the nicotine and tobacco market to predict the impact of television commercials for electronic cigarettes (e-cigarettes) on youth.

Surveys were administered over a three-year period to 417 alternative high school students from Southern California who had never used e-cigarettes, cigarettes or cigars at the baseline. Covariate-adjusted logistic regression causal mediation models were used to test competing hypotheses from the PLC and PEC frameworks.

Results support a refined version of the PEC framework where e-cigarette commercials increase the odds of e-cigarette use, which leads to subsequent use of competing products including cigarettes and cigars.

This investigation demonstrates the utility of frameworks that conceptualize youth-oriented marketing as a two-part process in which potential customers are first convinced to adopt a behavior and then enticed to use a specific product to enact the behavior.

Rising rates of nicotine and tobacco product use among youth may be partially attributable to e-cigarette commercials.

Regulations in the USA that permit television commercials for e-cigarettes but restrict the promotion of cigarettes and cigars have created an opportunity to study product adoption among youth consumers when one product has a strategic marketing advantage.

Mathematics is a hybrid subject with the idea of number tending to unfold while some major geometrical innovations cannot be understood in these terms. The deployment of evolutionary, critical and non‐evolutionary structuralist conceptions in the analysis of mathematical development draws the conclusion that, in order to fully understand this development, it is necessary to consider mathematics' relations with other (artistic and scientific) concerns, the tendencies implicit in its subsystems, and the connections between its various fields, as well as the ability of mathematicians to appraise critically any given formulation and thereby transcend it.