Integration of migrants in Italy: A simple general and objective measure

Measuring migrants’ integration into host societies is a challenging task as, in general, measuring any social behavior and social phenomena. The task is affected by many specific problems related to the definition of the objective of study and the impact of subjective evaluations in the construction of an index. Our study aims to provide a measure of integration as much as possible general and objective. More in details, first, we consider some different general aspects of the integration problem related to migrants’ polarization, cultural diversification, social stability, integration in the labor market. Second, we aggregate them in a synthetic linear index, which is rather objective since the weights are computed by only considering the statistical properties of our dataset, i.e. choosing those weights that minimize the information loss in terms of data variances/co-variances.Migrations; migrants’ integration; regional index; principal component analysis

The Voice of Optimization

We introduce the idea that using optimal classification trees (OCTs) and optimal classification trees with-hyperplanes (OCT-Hs), interpretable machine learning algorithms developed by Bertsimas and Dunn [2017, 2018], we are able to obtain insight on the strategy behind the optimal solution in continuous and mixed-integer convex optimization problem as a function of key parameters that affect the problem. In this way, optimization is not a black box anymore. Instead, we redefine optimization as a multiclass classification problem where the predictor gives insights on the logic behind the optimal solution. In other words, OCTs and OCT-Hs give optimization a voice. We show on several realistic examples that the accuracy behind our method is in the 90%-100% range, while even when the predictions are not correct, the degree of suboptimality or infeasibility is very low. We compare optimal strategy predictions of OCTs and OCT-Hs and feedforward neural networks (NNs) and conclude that the performance of OCT-Hs and NNs is comparable. OCTs are somewhat weaker but often competitive. Therefore, our approach provides a novel insightful understanding of optimal strategies to solve a broad class of continuous and mixed-integer optimization problems

Controllability and non-neutrality of economic policy: The Tinbergen’s approach in a strategic context

In the last 20 years issues of policy effectiveness and neutrality (notably with reference to monetary policy) have been increasingly raised in the context of static LQ (linear-quadratic) policy games. The general conditions ensuring policy non-neutrality in a strategic environment remains however to be inquired. We state these conditions by generalizing the classical theory of economic policy developed by Tinbergen and others to such a context. We also state necessary and sufficient conditions for the existence of Nash and Stackelberg equilibria. We finally show that the conditions for monetary policy effectiveness asserted in the literature respect our general conditions.LQ-policy games, policy ineffectiveness, static controllability

Central banks and information provided to the private sector

This paper examines the information provided to the private sector by central anks. By using the principal component analysis, we investigated the variance of the procedural rules followed by nine major central banks about information reatments. We investigate problems related to the information coming from the entral banks by focusing on the quantity and quality perspectives and highlight the methodological complexity of the investigation. We find that a synthetic uantitative index of transparency is not enough to represent the phenomenon ince it can result misleading in understanding the behavior of institutionally different central banks associated with the same index values.Central bank transparency, principal components, monetary policy.

Integration of migrants in Italy: A simple general and objective measure

Measuring migrants’ integration into host societies is a challenging task as, in general, measuring any social behavior and social phenomena. The task is affected by many specific problems related to the definition of the objective of study and the impact of subjective evaluations in the construction of an index. Our study aims to provide a measure of integration as much as possible general and objective. More in details, first, we consider some different general aspects of the integration problem related to migrants’ polarization, cultural diversification, social stability, integration in the labor market. Second, we aggregate them in a synthetic linear index, which is rather objective since the weights are computed by only considering the statistical properties of our dataset, i.e. choosing those weights that minimize the information loss in terms of data variances/co-variances.migrations, migrants’ integration, regional index, principal component analysis

Tinbergen and Theil Meet Nash: Controllability in Policy Games

This paper generalizes the classical theory of economic policy to a static LQ-strategic context between n players. We show how this generalized version of controllability can profitably be used to deal with policy ineffectiveness issues and Nash equilibrium existence.Policy games, policy ineffectiveness, static controllability, Nash equilibrium existence

Non-neutrality of monetary policy in policy games

The main aim of this article is to investigate the sources of non- neutrality in policy games involving one or more trade unions. We use a simple set up in order to clearly expose the basic mechanisms that also work in more complex frameworks. We show that there are common roots in the non-neutrality results so far obtained in apparently different contexts as, e.g., an inflation-averse union playing against the government; a union sharing some other common objective with a policy maker; or when more than one union interacts with monopolistic competitors in the goods market and a policymaker. We finally show that there are other cases where the non-neutrality result can arise.neutrality, money, unions, policy game