We investigate the economics of real estate investment when maintenance of a property enhances neighborhood value. Because a property owner does not recognize this positive externality for his/her neighbor, he/she under-maintains. Smaller properties benefit most from this externality. We show...

We show that the value maximizing hurdle rate for research and development (R&D) investments among private firms operating in a market setting is less than for conventional investments despite the fact that R&D has development risk. Because development risk arises only during R&D, entrepreneurs...