Progress, decline, growth: product and productivity in Italian agriculture, 1000–2000

This article estimates agricultural production and output per worker in Italy, from about the year 1000 to the present. The millennium may be divided neatly into three periods. Output per worker increased until the fourteenth century, declined, with some fluctuations, until the end of the nineteenth century, and then recovered, booming in the past 50 years.     

A Simple Method for Calculating the imin Rate for an Investment Project

The i_min rate of an investment project is the smallest rate such that all the intermediate balances of the project have the same sign or ore null. This rate is mainly used to determine whether an investment project is a pure or a mixed investment project. In this technical note we point out that as i_min is the greatest internal rate of return among the ones of pure truncated projects and since no eventual mixed truncated project can have a root with a value greater or equal to i_min , we then can easily obtain i_min by appropriate use of standard internal rate of return computing routines.     

DOES ORGANIZATIONAL FORM AFFECT INVESTMENT DECISIONS?*

I investigate whether organizational changes affect investment decisions using evidence from the hospital industry in the United States. During the 1990s, hospitals and physicians have reorganized the way they trade with each other, vertically consolidating the provision of healthcare services. I provide empirical evidence that hospitals adopting the new organizational forms add more healthcare services over time than hospitals that are independent of their physicians. I also find that when the average percentage of county population covered by each HMO increases, the differences in investment behavior between vertically consolidated and independent hospitals become larger.     

Screening and Labor Market Flows in a Model with Heterogeneous Workers

We construct a model in which screening of heterogeneous workers by employers plays a central role in determining both the flows into and out of unemployment. Following a negative productivity shock, the share of low‐efficiency workers in the pool of unemployed rises, and this composition effect reduces the incentive of firms to post vacancies, lowering job opportunities for all workers. Heterogeneity in workers’ efficiency amplifies unemployment fluctuations in economies with small gross labor flows and leads to persistent buildups of unemployment and slow recoveries. The composition effect worsens the unemployment–inflation trade‐off faced by the monetary authority, leading to very large sacrifice ratios when a fall in productivity primarily affects low‐efficiency workers.     

Monetary Policy Choices in Emerging Market Economies: The Case of High Productivity Growth

We develop a general equilibrium model of an emerging market economy where productivity growth differentials between tradable and non-tradable sectors result in an equilibrium appreciation of the real exchange rate—the so-called Balassa-Samuelson effect. The paper explores the dynamic properties of this economy and the welfare implications of alternative policy rules. We show that the real exchange rate appreciation limits the range of policy rules that, with a given probability, keep inflation and exchange rate within predetermined numerical targets. We also find that the B–S effect raises by an order of magnitude the welfare loss associated with policy rules that prescribe active exchange rate management.     

Centralization vs. Decentralization: A Principal-Agent Analysis

The decision to allocate policy jurisdictions to different levels of government is related to a number of trade‐offs between the advantages and disadvantages of centralized versus decentralized provision of public services. A trade‐off central to many discussions is that between the internalization of externalities under centralization versus an “accountability” advantage of decentralization. In this paper we formalize this trade‐off in the context of a class of principal–agent models known as common agency.     

How much do we know about market integration in Europe?1

The literature on commodity market integration has boomed in the last 15 years, and a sort of consensus is slowly emerging, at least with regard to trends in the last two centuries. This article argues that this consensus is fragile because the research is haunted by serious methodological shortcomings. The results are not really comparable because authors use a bewildering array of statistical techniques, without bothering too much about their assumptions and, more generally, about the theoretical foundations of their work. Market integration is a multi‐faceted process and available techniques can be classified according to the issues they are suitable to tackle. In other words, the methodological choices, together with the available data, have steered the research towards a quite narrow set of issues. Thus we know much less than we suppose. The final section sketches out a research agenda beyond pure measurement.