International credit markets and global business cyclesJournal articlePatrick A. Pintus, Yi Wen et Xiaochuan Xing, International Journal of Economic Theory, Volume 15, Issue 1, pp. 53-75, 2019

This paper stresses a new channel through which global financial linkages contribute to the co‐movement in economic activity across countries. We show in a two‐country setting with borrowing constraints that international credit markets are subject to self‐fulfilling variations in the world real interest rate. Those expectation‐driven changes in the borrowing cost in turn act as global shocks that induce strong cross‐country co‐movements in both financial and real variables (such as asset prices, gross domestic product, consumption, investment, and employment). When firms around the world benefit from unexpectedly low debt repayments, they borrow and invest more, which leads to excessive supply of collateral and of loanable funds at a low interest rate, thus fueling a boom both at home and abroad. As a consequence, business cycles are synchronized internationally. Such a stylized model thus offers one way to rationalize both the existence of a world business‐cycle component, documented by recent empirical studies through dynamic factor analysis, and the factor's intimate link to global financial markets.

Short-run pain, long-run gain: the conditional welfare gains from international financial integrationJournal articleRaouf Boucekkine, Giorgio Fabbri et Patrick A. Pintus, Economic Theory, Volume 65, Issue 2, pp. 329-360, 2018

This paper aims at clarifying the analytical conditions under which financial globalization originates welfare gains in a simple endogenous growth setting. We focus on an open-economy AK model in which the capital-deepening effect of financial globalization boosts growth in a in permanent but entails an entry cost in order to access international credit markets. We show that constrained borrowing triggers substantial welfare gains, even at small levels of international financial integration, provided that the autarkic growth rate is larger than the world interest rate. Such conditional welfare benefits boosted by stronger growth—long-run gain—arise in our preferred model without investment commitment and they range, relative to autarky, from about 2% in middle-income countries to about 13% in OECD-type countries under international financial integration. Sizeable benefits emerge despite the fact that consumption initially falls—short-run pain—which is, however, shown not to dwarf positive growth changes.

Mean growth and stochastic stability in endogenous growth modelsJournal articleRaouf Boucekkine, Patrick A. Pintus et Benteng Zou, Economics Letters, Volume 166, Issue C, pp. 18-24, 2018

Under uncertainty, mean growth of, say, wealth is often defined as the growth rate of average wealth, but it can alternatively be defined as the average growth rate of wealth. We argue that stochastic stability points to the latter notion of mean growth as the theoretically relevant one. Our discussion is cast within the class of continuous-time AK-type models subject to geometric Brownian motions. First, stability concepts related to stochastic linear homogeneous differential equations are introduced and applied to the canonical AK model. It is readily shown that exponential balanced-growth paths are not robust to uncertainty. In a second application, we evaluate the quantitative implications of adopting the stochastic-stability-related concept of mean growth for the comparative statics of global diversification in the seminal model due to Obstfeld (1994).

Land collateral and labor market dynamics in FranceJournal articleLéo Kaas, Patrick A. Pintus et Simon Ray, European Economic Review, Volume 84, Issue C, pp. 202-218, 2016

The value of land in the balance sheet of French firms correlates positively with their hiring and investment flows. To explore the relationship between these variables, we develop a macroeconomic model with firms that are subject to both credit and labor market frictions. The value of collateral is driven by the forward-looking dynamics of the land price, which reacts endogenously to fundamental and non-fundamental (sunspot) shocks. We calibrate the model to French data and find that land price shocks give rise to significant amplification and hump-shaped responses of investment, vacancies and unemployment that are in line with the data. We show that both the endogenous movements in the firms׳ discount factor and the sluggish response of the land price are key elements that drive the results.

Land prices, lending to companies and job creationsJournal articleLéo Kaas, Patrick A. Pintus et Simon Ray, Rue de la Banque, Issue 14, 2015

The fluctuations of the value of land held by French firms present a very similar pattern to those of both investment and employment. This Rue de la Banque presents a model in which firms face imperfect labour and credits markets. Due to a collateral constraint for credit, the market value of land in firms’ balance sheets plays an important role in determining how much they can borrow, and thus affects their investment levels and hiring decisions. The empirical results confirm the predictions of the theoretical model. Fluctuations in land prices had an impact on the business cycle and on the dynamics of the labour market in France.

Growth and financial liberalization under capital collateral constraints: The striking case of the stochastic AK model with CARA preferencesJournal articleRaouf Boucekkine, Giorgio Fabbri et Patrick A. Pintus, Economics Letters, Volume 122, Issue 2, pp. 303-307, 2014

We consider a small-open, collateral-constrained AK economy. We show that the combination of CARA preferences and uncertainty on capital inflows generates long-term growth while the deterministic counterpart does not: long-term growth is entirely driven by precautionary savings, and the asymptotic growth rate of the expected capital stock is increasing in both the risk magnitude and the Arrow–Pratt absolute risk aversion parameters.

Leveraged Borrowing and Boom-Bust CyclesJournal articlePatrick A. Pintus et Yi Wen, Review of Economic Dynamics, Volume 16, Issue 4, pp. 617-633, 2013

Investment booms and asset "bubbles" are often the consequence of heavily leveraged borrowing and speculations of persistent growth in asset demand. We show theoretically that dynamic interactions between elastic credit supply (due to leveraged borrowing) and persistent credit demand (due to consumption habit) can generate a multiplier-accelerator mechanism that transforms a one-time productivity or financial shock into large and long-lasting boom-bust cycles. The predictions are consistent with the basic features of investment booms and the consequent asset-market crashes led by excessive credit expansion. (Copyright: Elsevier)

History’s a curse: leapfrogging, growth breaks and growth reversals under international borrowing without commitmentJournal articleRaouf Boucekkine et Patrick A. Pintus, Journal of Economic Growth, Volume 17, Issue 1, pp. 27-47, 2012

A simple open-economy AK model with collateral constraints accounts for growth breaks and growth-reversal episodes, during which countries face abrupt changes in their growth rate that may lead to either growth miracles or growth disasters. Absent commitment to investment by the borrowing country, imperfect contract enforcement leads to an informational lag such that the debt contracted upon today depends upon the past stock of capital. The no-commitment delay originates a history effect by which the richer a country has been in the past, the more it can borrow today. For (arbitrarily) small delays, the history effect offsets the growth benefits from international borrowing and dampens growth, and it leads to both leapfrogging in long-run levels and growth breaks. When large enough, the history effect originates growth reversals and we connect the latter to leapfrogging. Finally, we argue that the model accords with the reported evidence on changes in the growth rate at break dates. We also provide examples showing that leapfrogging and growth reversals may coexist, so that currently poor but fast-growing countries experiencing sharp growth reversals may end up, in the long-run, significantly richer than currently rich but declining countries.

On the optimal control of a linear neutral differential equation arising in economicsJournal articleRaouf Boucekkine, Patrick A. Pintus et Giorgio Fabbri, Optimal Control Applications and Methods, Volume 33, Issue 5, pp. 511-530, 2012

In this paper, we apply two optimization methods to solve an optimal control problem of a linear neutral differential equation (NDE) arising in economics. The first one is a variational method, and the second follows a dynamic programming approach. Because of the infinite dimensionality of the NDE, the second method requires the reformulation of the latter as an ordinary differential equation in an appropriate abstract space. It is shown that the resulting Hamilton–Jacobi–Bellman equation admits a closed-form solution, allowing for a much finer characterization of the optimal dynamics compared with the alternative variational method. The latter is clearly limited by the nontrivial nature of asymptotic analysis of NDEs. Copyright © 2011 John Wiley & Sons, Ltd.

Book review of "Expectations, Employment and Prices" by Roger Farmer.Journal articlePatrick A. Pintus, Journal of Economic Literature, Volume 50, Issue 1, pp. 184-187, 2012

"Expectations, Employment and Prices" by Roger E. A. Farmer. The EconLit Abstract of the reviewed work begins: Presents a Keynesian economics-based analysis of the business cycle and how to control it, focusing on the inefficiency of the equilibrium level of unemployment. Discusses the basic model; an extension to multiple goods; a model with investment and saving; a new way to understand business cycle facts; the Great Depression—telling the Keynesian story in a new way; the wartime recovery—a dynamic model where fiscal policy matters; the U.S. economy from 1951 to 2000—employment and gross domestic product; money and uncertainty; money and inflation since 1951; and how to fix the economy. Farmer is Professor and Department Chair of the Department of Economics at the University of California, Los Angeles. Bibliography; index.