No subject with a foot in both the academic and public domains like macroeconomics
remains unchanged for long. The search for improved explanations, and the challenge of …

This paper presents a fully specified model of long-run growth in which knowledge is
assumed to be an input in production that has increasing marginal productivity. It is …

Grossman and Helpman develop a unique approach in which innovation is viewed as a
deliberate outgrowth of investments in industrial research by forward-looking, profit-seeking …

A nation that lacks physical objects like factories and roads suffers from an object gap. A
nation that lacks the knowledge used to create value in a modern economy suffers from an …

Entrepreneurs are widely recognized for the vital contributions they make to economic
growth and general welfare, yet until fairly recently entrepreneurship was not considered …

This paper has benefited a lot from the many stimulating comments and suggestions that
Moses Abramovitz made as he guided me through the process of drafting and revising it. I …

This essay relates recent developments in growth theory to problems and ideas that first
engaged RF Harrod, E. Domar, and their neoclassical successors. The body of 'new growth …

Page 1 The Mystery of Economic Growth ELHANAN HELPMAN Page 2 Page 3 Page 4 AR
MORE than an intellectual puzzle for pundits, economists, and policymakers, economic …

Our aim in this paper is to exposit a convex model of equilibrium growth. The model has two
features that distinguish it from most other work on the subject: first, that the model is convex …

The purpose of this paper is to review some of the recent developments in endogenous
growth models. Specifically, our focus is on the growth effects of productive government …