Bicocca Open Archive

Two-layer sharply stratified Euler fluids in three dimensions: a Hamiltonian setting

Three-dimensional two-layer incompressible Euler fluids are studied from a Hamiltonian perspective. A natural Hamiltonian structure for the effective 2D model described by the interface-value of the field variables is obtained by means of a Hamiltonian reduction process from the 3D Poisson structure. The problem of expressing the fluid’s energy in terms of the reduced variables is considered, and it is shown that in the weakly nonlinear approximation our procedure gives rise to a so-called 2D...

Le ragazze del 2002

Electoral incentives when the stakes are low: a case study from an economics department

Since the pioneering work of Lizzeri and Persico (2001), it has been well known that, in winner-take-all systems, office-motivated politicians may favor targeted redistribution over the provision of public goods. Motivated by the possibility that similar incentives may arise even in small organizations, we examine a policy proposal to revise a journal-ranking system in a medium-sized Economics Department. At the same time, a majority of faculty members signed a petition on an unrelated issue ...

Can Social Support Buffer Inequality? Evidence from PISA 2022 on Objective-Subjective Status Gaps and Perceived Social Mobility

Family socio-economic status is a major structural determinant of adolescents’ educational trajectories shaping academic performance and access to future opportunities, and expectations of success across their life course (OECD, 2023). Socioeconomic advantage provides students with material, cultural, and relational resources that increase the likelihood of favourable school outcomes and access to educational and occupational pathways. Yet adolescents do not experience inequality only through...