Ricerc@Sapienza

Since the beginning of its experience as an immigration country, Italy has received only small numbers of asylum-seekers. Until the late 2000s, with the reception of EU directives on asylum, Italy had hardly any comprehensive normative framework on asylum. The so-called refugee crisis initiated in the second half of 2013, with hundreds of thousands people crossing the Mediterranean to reach Italy, has decisively changed these features. In such a context, how have Italian policies reacted to the increasing magnitude and complexity of mixed flows across the Mediterranean?

We present a North-South model with labor market frictions and labor migration to study the dynamic implications of workers mobility on employment, capital accumulation and welfare. In the baseline model, the Northern country is able to control immigration flows by setting a cap on the number of foreign workers. We find that, despite an increase in migration displaces native employment in the short-run, a permanent raise of the migration cap stimulates capital accumulation, improves labor market conditions and increases social welfare in the long run.

In the Network Function Virtualization (NFV) paradigm any service is represented by a Service Function Chain (SFC) that is a set of Virtual Network Functions (VNF) to be executed according to a given order. The running of VNFs needs the instantiation of VNF Instances (VNFIs) that are software modules executed on Virtual Machines. In this paper we cope with the migration problem of the VNFIs needed in the low traffic periods to switch off servers and consequently to save energy consumption.

Network function virtualization (NFV) is a new network architecture framework that implements network functions in software running on a pool of shared commodity servers. NFV can provide the infrastructure flexibility and agility needed to successfully compete in today's evolving communications landscape. Any service is represented by a service function chain (SFC) that is a set of VNFs to be executed according to a given order. The running of VNFs needs the instantiation of VNF instances (VNFIs) that are software modules executed on virtual machines.