It is well known that rational bubbles can be sustained in balanced growth path of a deterministic economy when the return to capital r is equal to the growth rate g. When there is a lack of stores of value, bubbles can implement an efficient allocation. This paper considers a world where r...

It is well known that rational bubbles can be sustained in balanced growth path of a deterministic economy when the return to capital <I>r</I> is equal to the growth rate <I>g</I>. When there is a lack of stores of value, bubbles can implement an efficient allocation. This paper considers a world where <I>r</I>...</i></i></i>

When types of workers are imperfect substitutes, the Mincerian rate to return to human capital is negatively related to the supply of human capital. We work out a simple model for the joint evolution of output and wage dispersion. We estimate this model using cross-country panel data on GDP and...