1,721,103 research outputs found
Sulle tracce della “vera” sorgente: analisi dei depositi di ossidiana del gruppo geo-chimico SA
No full textSocial responsibility in a bilateral monopoly with downstream convex technology
Full text linkThis paper shows that, in a bilateral monopoly with consumer-friendly social concerns, only the downstream firm is always incentivized to adopt corporate social responsibility (CSR) if it has decreasing returns to the input, leading to a Pareto-superior outcome in equilibrium. This occurrence differs from a standard linear bilateral monopoly in which, if the upstream (downstream) firm commits itself to CSR before the downstream (upstream) does, then both firms improve profits, while they do not deviate from pure profit-maximization if CSR levels are simultaneously chosen. Straightforward policy and empirical implications are offered, and this paper argues that the presence of CSR-type firms crucially depends on technology
Endogenous lifetime, accidental bequests and economic growth
No full textThis paper introduces the concept of unintentional bequests in a closed economy à la Chakraborty (J Econ Theory 116:119–137, 2004) with overlapping generations. We show that scarce public investments in health can lead to poverty traps depending on the relative size of the output elasticity of capital. More importantly, the existence of unintentional bequests, rather than a market for annuities, means that health tax rates play a prominent role in determining the stability of the long-term equilibrium in rich economies. In fact, Neimark–Sacker bifurcations and endogenous fluctuations occur depending on the size of the public health system
Transposable Elements: Major Players in Shaping Genomic and Evolutionary Patterns
Full text linkTransposable elements (TEs) are ubiquitous genetic elements, able to jump from one location of the genome to another, in all organisms. For this reason, on the one hand, TEs can induce deleterious mutations, causing dysfunction, disease and even lethality in individuals. On the other hand, TEs can increase genetic variability, making populations better equipped to respond adaptively to environmental change. To counteract the deleterious effects of TEs, organisms have evolved strategies to avoid their activation. However, their mobilization does occur. Usually, TEs are maintained silent through several mechanisms, but they can be reactivated during certain developmental windows. Moreover, TEs can become de-repressed because of drastic changes in the external environment. Here, we describe the ‘double life’ of TEs, being both ‘parasites’ and ‘symbionts’ of the genome. We also argue that the transposition of TEs contributes to two important evolutionary processes: the temporal dynamic of evolution and the induction of genetic variability. Finally, we discuss how the interplay between two TE-dependent phenomena, insertional mutagenesis and epigenetic plasticity, plays a role in the process of evolution
Dove approvvigionarsi? Disponibilità potenziali e sfruttamento neolitico dei depositi secondari di ossidiana lungo il versante sud-occidentale del Monte Arci (Sardegna, Italia)
No full textThe newly set and mapped secondary deposits of Monte Arci obsidians along the south-western flanks of the massif revealed an unexpected concentration and mixing of raw materials belonging to three (SA, SB2, SC) among the four discrete geo-chemical types actually exploited and put into circulation inside Neolithic exchange networks. It seemed us to be of great relevance to get a precise assessment of the spatial scale of distribution of these different obsidian groups, in order to propertly understand both the modes and strategies of prehistoric raw matter selection, procurement and circulation. Thus particular attention was given to a detailed mapping of obsidians distribution inside this complex mixing area, recording in the meanwhile the presence of blocks showing the minimal useful features to ensure the known Neolithic modes of reduction. It follows a better understanding of the raw material sourcing behaviours, as they are reflected in the different Neolithic systems of obsidian production
Skill mismatch and the dynamics of Italian companies’ productivity
No full textThis work explores the relationship between labour productivity and skill (mis) match relying on a unique database integrating information at both the firm and the worker level. The analysis is based on a novel skill match indicator providing actual and qualitatively detailed information on the demand/supply of skills. Focusing on a sample of Italian limited liability companies observed during 2012, 2014 and 2017, we show that the ability to match their skills need via new hires is always positively correlated to companies’ labour productivity. This result is robust to the inclusion of variables accounting for sectoral-level training intensity, firm-level recruitment behaviour, a capillary set of firm-level controls and across size classes
Indice onomastico, Indice toponomastico
No full textIndice onomastico e toponomastico dei documenti contenuti nel volum
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