the street garment vendors are playing a significant role in the fields of the economic development through protecting resources (garment products) from such a position where they are treated as wastes; very much less valued products and creating the opportunity for self-employment. this study aimed at showing the economic contribution and the impact of the street vendors to the local community...

by shouldering the burden of a big chunk of global production, and giving shelter to half of the world’s population, currently cities play an important role in national economies. benefits of agglomeration in cities have played a major role in the process of economic development of different countries, however, the expansion of urbanization has produced some problems including environmental and...

Sharing economy platforms facilitate people's sharing of underutilized resources by adding value to their users, such as reducing transaction costs and building trust. However, it is discovered by practitioners that users may actually bypass, or 'disintermediate', the platforms to strike direct deals on their own. This phenomenon motivates this research to understand sharing economy user bypass...

In Johnson and Lappin (1997) (J&L) we presented arguments against the incorporation of global economy conditions on derivations into the theory of grammar. The economy of derivation model of grammar proposed in Chapter 4 of Chomsky (1995b) postulates three such conditions: Procrastinate, The Shortest Derivation Principle (SDP), and the Have an Effect on Output Condition (HEOC). We showed that t...

We consider the problem of selecting a portfolio of assets that provides the investor a suitable balance of expected return and risk. With respect to the seminal mean-variance model of Markowitz, we consider additional constraints on the cardinality of the portfolio and on the quantity of individual shares. Such constraints better capture the real-world trading system, but make the problem more...

How does local unemployment influence presidential elections? Some argue that, for voters, the state of the local economy is an afterthought to that of the national economy. Those who argue that local unemployment matters fall into two camps. Recent research finds that local unemployment is a partisan issue that benefits Democratic candidates because voters believe they are the party best equip...