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Bài viết của Trần Bảo Ngọc

Linear Equations

Linear regression for two variables is based on a linear equation with one independent variable. The equation has the form: y = a + bx where a and b are constant numbers. The variable x is the independent variable, and y is the dependent ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa

Experimental Design and Ethics

Does aspirin reduce the risk of heart attacks? Is one brand of fertilizer more effective at growing roses than another? Is fatigue as dangerous to a driver as the influence of alcohol? Questions like these are answered using randomized experiments. In this ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa

The Benefits and Costs of U.S. Environmental Laws

Government economists have estimated that U.S. firms may pay more than $200 billion per year to comply with federal environmental laws. That is big bucks. Is the money well spent? The benefits of a cleaner environment can be divided into four areas: (1) ...

Tác giả: Trần Bảo Ngọc viết 15:56 ngày 25/05/2018 chỉnh sửa

Introduction to Exchange Rates and International Capital Flows

Trade Around the World Is a trade deficit between the United States and the European Union good or bad for the U.S. economy? (Credit: modification of work by Milad Mosapoor/Wikimedia Commons) Is a Stronger Dollar Good for the U.S. Economy? From ...

Tác giả: Trần Bảo Ngọc viết 15:55 ngày 25/05/2018 chỉnh sửa

Why the Private Sector Under Invests in Innovation

Market competition can provide an incentive for discovering new technology because a firm can earn higher profits by finding a way to produce products more cheaply or to create products with characteristics consumers want. As Gregory Lee, CEO of Samsung said, ...

Tác giả: Trần Bảo Ngọc viết 15:55 ngày 25/05/2018 chỉnh sửa

The Policy Implications of the Neoclassical Perspective

To understand the policy recommendations of the neoclassical economists, it helps to start with the Keynesian perspective. Suppose a decrease in aggregate demand causes the economy to go into recession with high unemployment. The Keynesian response would be to ...

Tác giả: Trần Bảo Ngọc viết 15:54 ngày 25/05/2018 chỉnh sửa

The Poverty Trap

Can you give people too much help, or the wrong kind of help? When people are provided with food, shelter, healthcare, income, and other necessities, assistance may reduce their incentive to work. Consider a program to fight poverty that works in this ...

Tác giả: Trần Bảo Ngọc viết 15:54 ngày 25/05/2018 chỉnh sửa

Introduction to the Keynesian Perspective

Signs of a Recession Home foreclosures were just one of the many signs and symptoms of the recent Great Recession. During that time, many businesses closed and many people lost their jobs. (Credit: modification of work by Taber Andrew Bain/Flickr Creative ...

Tác giả: Trần Bảo Ngọc viết 15:53 ngày 25/05/2018 chỉnh sửa

Causes of Inflation in Various Countries and Regions

Policymakers of the high-income economies appear to have learned some lessons about fighting inflation . First, whatever happens with aggregate supply and aggregate demand in the short run, monetary policy can be used to prevent inflation from becoming ...

Tác giả: Trần Bảo Ngọc viết 15:53 ngày 25/05/2018 chỉnh sửa

Outcomes and the Type I and Type II Errors

When you perform a hypothesis test, there are four possible outcomes depending on the actual truth (or falseness) of the null hypothesis H 0 and the decision to reject or not. The outcomes are summarized in the following table: ACTION ...

Tác giả: Trần Bảo Ngọc viết 15:53 ngày 25/05/2018 chỉnh sửa