Welfare Effects of Price Integration in Local Public Transport

Abstract ** :  In metropolitan areas collective transport is often supplied by many firms and in many modes. The paper focusses on the merging of decisions about prices in two market regimes: monopoly and benevolent regulation through Ramsey pricing. The results confirm that centralization entails efficiency gains under monopoly whenever a unique supplier substitutes many firms serving each link of a network. Under benevolent regulation, instead, centralization entails efficiency gains only under certain conditions. Moreover, efficiency improvements under Ramsey pricing involve the introduction of cross subsidies among previous regulatory jurisdictions. Hence some users gain while others lose. Both the theoretical and empirical literature suggest that periphery residents are the main beneficiaries of centralization .     

Strategic Choice of the Price Structure and Entry Deterrence Under Price Cap Regulation

This paper shows that a price‐capped firm under the threat of entry in some of the markets it serves can strategically manipulate its price structure to deter entry. In doing so, the regulated firm uses the price cap constraint as a commitment device to an aggressive pricing behaviour in case of entry. A (dynamic) price cap generally entails that the prices allowed today are a function of the previous‐period prices and that the tighter is the constraint on each price, the larger is the quantity sold of this good in the previous period. Hence, the regulated firm may strategically choose its price structure before entry to place a tighter regulatory control on the prices set in the (potentially) competitive markets and to make it optimal to charge in these markets – in case of entry – prices so low that entry is unprofitable.     

Banks' Inefficiency and Economic Growth: A Micro‐Macro Approach

This paper offers a methodological contribution to the empirical analysis of the relationship between banking and economic growth by suggesting a new indicator for the state of development of the banking system based on a measure of bank microeconomic efficiency. This choice helps to overcome the problem of causality and to capture the effects of banks' activity on growth. This new approach is then applied to analyse the relationship between the banking system and economic growth in the Italian regions, through a dynamic panel technique. The empirical results show the existence of an independent effect exerted by the efficiency of banks on regional growth.     

Inequality,Democracy, and Persistence: Is There a Political Kuznets Curve?

The aim of this paper is to provide comprehensive empirical evidence on recent theories that link democracy and income inequality for the period 1960–1997. In simple cross-country regressions I find a non-monotonic link between democracy and inequality when using ordinary least squares, instrumental variables, and Eusufzai tests. I also employ dynamic panel data techniques, which control for potential simultaneity and heterogeneity problems. I also find support for the existence of apolitical Kuznets curve. Moreover, it appears that income inequality is unconditionally persistent. Results are robust to different democracy proxies when sensitivity analysis is applied.     

Modeling internal commitment mechanisms and self-control: A neuroeconomics approach to consumption–saving decisions

We provide a new model of consumption–saving decisions which explicitly allows for internal commitment mechanisms and self-control. Agents have the ability to invoke either automatic processes that are susceptible to the temptation of ‘over-consuming,’ or alternative control processes which require internal commitment but are immune to such temptations. Standard models in behavioral economics ignore such internal commitment mechanisms. We justify our model by showing that much of its construction is consistent with dynamic choice and cognitive control as they are understood in cognitive neuroscience.The dynamic consumption–saving behavior of an agent in the model is characterized by a simple consumption–saving goal and a cut-off rule for invoking control processes to inhibit automatic processes and implement the goal. We discuss empirical tests of our model with available individual consumption data and we suggest critical tests with brain-imaging and experimental data.     

Semiparametric Difference-in-Differences Estimators

The difference-in-differences (DID) estimator is one of the most popular tools for applied research in economics to evaluate the effects of public interventions and other treatments of interest on some relevant outcome variables. However, it is well known that the DID estimator is based on strong identifying assumptions. In particular, the conventional DID estimator requires that, in the absence of the treatment, the average outcomes for the treated and control groups would have followed parallel paths over time. This assumption may be implausible if pre-treatment characteristics that are thought to be associated with the dynamics of the outcome variable are unbalanced between the treated and the untreated. That would be the case, for example, if selection for treatment is influenced by individual-transitory shocks on past outcomes (Ashenfelter's dip). This article considers the case in which differences in observed characteristics create non-parallel outcome dynamics between treated and controls. It is shown that, in such a case, a simple two-step strategy can be used to estimate the average effect of the treatment for the treated. In addition, the estimation framework proposed in this article allows the use of covariates to describe how the average effect of the treatment varies with changes in observed characteristics.     

Technological condition for balanced growth: A criticism and restatement

According to prevailing opinion, only the neutral form of technological progress in the Harrod sense is consistent with balanced growth in a one-sector constant returns-to-scale economy. Though various definitions of balanced growth are in use in the literature, the above highly restrictive technological condition is believed to hold for all of them. The paper demonstrates that this belief is not correct. The condition is shown to be false if the definition of balanced growth (i) does not require the constancy of the marginal product of capital (or the interest rate), and (ii) permits the time semiinfinite or indeed any finite balanced growth path. More specifically, under (i) and (ii) there exists a balanced growth path consistent with a significantly wide class of technological changes of the capital-using (labour-saving) form in the Harrod sense. Alternatively, this condition is correct if either (i) the interest rate is required to be constant or (ii) growth is balanced if it is such for all time—that is, for both past and future. The condition is also correct if the socioeconomic institutions are such that the constancy of the savings ratio implies the constancy of the capital share.