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Bài viết của Nguyễn Mỹ Hương

Efficiency in Perfectly Competitive Markets

When profit-maximizing firms in perfectly competitive markets combine with utility-maximizing consumers, something remarkable happens: the resulting quantities of outputs of goods and services demonstrate both productive and allocative efficiency (terms that ...

Tác giả: Nguyễn Mỹ Hương viết 15:57 ngày 25/05/2018 chỉnh sửa

Facts About the Chi-Square Distribution

The notation for the chi-square distribution is: χ∼ χ df 2 where df = degrees of freedom which depends on how chi-square is being used. (If you want to practice calculating chi-square probabilities then use ...

Tác giả: Nguyễn Mỹ Hương viết 15:57 ngày 25/05/2018 chỉnh sửa

Demand, Supply, and Efficiency

The familiar demand and supply diagram holds within it the concept of economic efficiency. One typical way that economists define efficiency is when it is impossible to improve the situation of one party without imposing a cost on another. Conversely, if ...

Tác giả: Nguyễn Mỹ Hương viết 15:56 ngày 25/05/2018 chỉnh sửa

Box Plots

Box plots (also called box-and-whisker plots or box-whisker plots ) give a good graphical image of the concentration of the data. They also show how far the extreme values are from most of the data. A box plot is constructed from five values: the minimum ...

Tác giả: Nguyễn Mỹ Hương viết 15:56 ngày 25/05/2018 chỉnh sửa

Rates of Change and Behavior of Graphs

Gasoline costs have experienced some wild fluctuations over the last several decades. [link] http://www.eia.gov/totalenergy/data/annual/showtext.cfm?t=ptb0524. Accessed 3/5/2014. lists the average cost, in dollars, of a gallon of gasoline for the years ...

Tác giả: Nguyễn Mỹ Hương viết 15:56 ngày 25/05/2018 chỉnh sửa

Intertemporal Choices in Financial Capital Markets

Rates of saving in America have never been especially high, but they seem to have dipped even lower in recent years, as the data from the Bureau of Economic Analysis in [link] show. A decision about how much to save can be represented using an intertemporal ...

Tác giả: Nguyễn Mỹ Hương viết 15:56 ngày 25/05/2018 chỉnh sửa

Matrices and Matrix Operations

(credit: “SD Dirk,” Flickr) Two club soccer teams, the Wildcats and the Mud Cats, are hoping to obtain new equipment for an upcoming season. [link] shows the needs of both teams. Wildcats Mud Cats Goals 6 10 ...

Tác giả: Nguyễn Mỹ Hương viết 15:55 ngày 25/05/2018 chỉnh sửa

Geometric Distribution

There are three main characteristics of a geometric experiment. There are one or more Bernoulli trials with all failures except the last one, which is a success. In other words, you keep repeating what you are doing until the first success. Then you stop. ...

Tác giả: Nguyễn Mỹ Hương viết 15:55 ngày 25/05/2018 chỉnh sửa

Regulating Natural Monopolies

Most true monopolies today in the U.S. are regulated, natural monopolies. A natural monopoly poses a difficult challenge for competition policy, because the structure of costs and demand seems to make competition unlikely or costly. A natural monopoly arises ...

Tác giả: Nguyễn Mỹ Hương viết 15:55 ngày 25/05/2018 chỉnh sửa

Components of Economic Growth

Over decades and generations, seemingly small differences of a few percentage points in the annual rate of economic growth make an enormous difference in GDP per capita. In this module, we discuss some of the components of economic growth, including physical ...

Tác giả: Nguyễn Mỹ Hương viết 15:55 ngày 25/05/2018 chỉnh sửa