منابع مشابه
Speculative Dynamics of Prices and Volume∗
We present a dynamic theory of prices and volume in asset bubbles. In our framework, predictable price increases endogenously attract short-term investors more strongly than long-term investors. Short-term investors amplify volume by selling more frequently, and they destabilize prices through positive feedback. Our model predicts a lead–lag relationship between volume and prices, which we conf...
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OBJECTIVE To analyze the performance of the Programa Farmácia Popular do Brasil (FPB - Brazilian Popular Pharmacy Program) in the public and private sectors, in terms of availability and cost of medicines for hypertension and diabetes. METHODS The methodology developed by the World Health Organization, in partnership with the Health Action International, was used to compare medicines prices a...
متن کاملOption Pricing on Commodity Prices Using Jump Diffusion Models
In this paper, we aim at developing a model for option pricing to reduce the risks associated with Ethiopian commodity prices fluctuations. We used the daily closed Unwashed Lekempti grade 5 (ULK5) coffee and Whitish Wollega Sesame Seed Grade3 (WWSS3) prices obtained from Ethiopia commodity exchange (ECX) market to analyse the prices fluctuations.The natures of log-returns of the prices exhibit a...
متن کاملModels for Electricity Prices
The deregulation of electricity markets has led to higher uncertainty in electricity prices. Electricity, as a commodity, differs from other commodities and financial assets as it is not storable. Among the consequences of this non-storability restriction, the most conspicuous one is the presence of large spikes in electricity prices. Another outcome of the non-storability of electricity is tha...
متن کاملDevelopment and Comparison of Methods Based on Grey and Fractal Models for Predicting Natural Gas Prices
Today there is consensus regarding the importance of predicting the price of energy carriers for economic development, including natural gas as a preferred energy source on environmental grounds. In this paper we analyze the nonlinear behavior of natural gas prices over time by use of the Grey Method (GM), Developed Grey Method (DGM), Fractal Discrete Grey Method (FDGM) and a compound Method II...
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ژورنال
عنوان ژورنال: Journal of Economic Perspectives
سال: 1990
ISSN: 0895-3309
DOI: 10.1257/jep.4.2.55