Photo Natacha Raffin

Natacha Raffin

Professeur(e)
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  • Research group

      Développement Durable, Environnement et Energie

  • Theme(s)
    • Macroéconomie de long-terme
    • Croissance
    • Environnement

2018-34 "Corporate Social Responsibility and workers' motivation at the industry equilibrium"

Victor Hiller, Natacha Raffin

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Abstract
We consider an industry in which firms compete at two levels, the labor market and the product market. On the labor market two types of workers co-exist, socially responsible or not. Firms may strategically use CSR investments in order to screen and to elicit more effort from responsible workers. By doing so, virtuous firms lower their production costs and display a competitive advantage on the product market. As a consequence, CSR strategies by firms shape the toughness of competition on that market. In turn, incentives that firms have to invest in CSR are dampened when competition becomes harsher. Hence, we identify a twofold relationship between CSR and competition. Due to feedback effects on the competitive pressure, an increase in workers' social awareness may reduce the overall level of CSR. We also show that an exogenous increase of competition may affect positively or negatively the corporate social performance depending on the proportion of responsible workers.
Classification-JEL
D64; D86; L13; M14; Q50.
Mot(s) clé(s)
Corporate Social Responsibility, Moral Motivation, Screening, Market Competition, Industry Equilibrium
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2016-36 "The falling sperm counts story": A limit to growth?"

Johanna Etner, Natacha Raffin, Thomas Seegmuller

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Abstract
We develop an overlapping generations model of growth, in which agents differ through their ability to procreate. Based on epidemiological evidence, we assume that pollution is a cause of this health heterogeneity, affecting sperm quality. Nevertheless, agents with impaired fertility may incur health treatments in order to increase their chances of parenthood. In this set-up, we analyse the dynamic behaviour of the economy and characterise the situation reached in the long run. Then, we determine the optimal solution that prevails when a social planner maximises a Millian utilitarian criterion and propose a set of available economic instruments to decentralise the optimal solution. We underscore that to correct for both the externalities of pollution and the induced-health inefficiency, it is necessary to tax physical capital while it requires to overall subsidy mostly harmed agents within the economy. Hence, we argue that fighting against the sources of an altered reproductive health is more relevant than directly inciting agents to incur health treatments.
Classification-JEL
O44; Q56; I18.
Mot(s) clé(s)
Pollution; Growth; Fertility; Health.
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2014-47 "The cost of pollution on longevity, welfare and economic stability"

Natacha Raffin, Thomas Seegmuller

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Abstract
This paper presents an overlapping generations model where pollution, private and public healths are all determinants of longevity. Public expenditure, financed through labour taxation, provide both public health and abatement. We study the complementarity between the three components of longevity on welfare and economic stability. At the steady state, we show that an appropriate fiscal policy may enhance welfare. However, when pollution is heavily harmful for longevity, the economy might experience aggregate instability or endogenous cycles. Nonetheless, a fiscal policy, which raises the share of public spending devoted to health, may display stabilizing virtues and rule out cycles. This allows us to recommend the design of the public policy that may comply with the dynamic and welfare objectives.
Classification-JEL
J10; O40; Q56; C62.
Mot(s) clé(s)
Longevity; Pollution; Welfare; Complex dynamics.
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2012-47 "Longevity, pollution and growth"

Natacha Raffin, Thomas Seegmuller

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Abstract
We analyze the interplay between longevity, pollution and growth. We develop an
OLG model where longevity, pollution and growth are endogenous. The authorities may provide two types of public services, public health and environmental maintenance, that participate to increase agents’ life expectancy and to sustain growth in the long term. We show that global dynamics might be featured by a high growth rate equilibrium, associated with longer life expectancy and a environmental poverty trap. We examine changes in public policies: increasing public intervention on health or environmental maintenance display opposite effects on global dynamics, i.e. on the size of the trap and on the level of the stable balanced growth path. On the contrary, each type of public policy induces a negative leverage on the long run rate of growth.
Classification-JEL
I15; O44; Q56
Mot(s) clé(s)
Life expectancy; Pollution; Health; Growth
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