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In Lecture note by Hong （2016), he argured modern econometrics is essentially built upon t

In Lecture note by Hong (2016), he argured modern econometrics is essentially built upon the following fundamental axioms: (1)Any economy can be viewed as a stochastic process governed by some probability law. (2)Economic phenomenon, as often summarized in form of data, can be reviewed as a realization of this stochastic data generating process. Discuss their roles and implications.

提问人：网友xxfylq 发布时间：2022-01-07

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更多“In Lecture note by Hong （2016)…”相关的问题

第1题

Econometrics is the branch of economics that _____.

A、studies the behavior of individual economic agents in making economic decisions

B、develops and uses statistical methods for estimating economic relationships

C、deals with the performance, structure, behavior, and decision-making of an economy as a whole

D、applies mathematical methods to represent economic theories and solve economic problems

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第2题

《 Econometrica 》创刊年份为1930年。

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第3题

Generations of Americans have been brought up to believe that a good breakfast is one life’s essentials. Eating

breakfast at the start of the day, we have all been told, and told again, is as necessary as putting gasoline in the

family car before starting a trip.

But for many people the thought of food first thing in the morning is by no means a pleasure. So despite all the

efforts, they still take no breakfast. Between 1977 and 1983, the latest year for which figures are available, the

number of people who didn’t have breakfast, increased by 33 percent.

For those who feel pain of guilt about not eating breakfast, however, there is some good news. Several studies

in the last few years indicate that, for adults especially, there may be nothing wrong with omitting breakfast.

“Going without breakfast does not affect performance,” said Arrold E. Bender, former professor of the nutrition

at Queen Elizabeth College in London, “nor does giving people breakfast improve performance.”

Scientific evidence linking breakfast to better health or better performance is surprisingly inadequate, and most

of the recent work involves children, not adults, “The literature”, says one researcher, Dr. Erresto at the University

of Texas, “is poor”.

The latest year for which figures could be obtained is _______.

A. the year the author wrote the article

B. 1977

C. any year between 1997 and 1983

D. 1983

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第4题

回答题。

Generations of Americans have been brought __ 26 __ to believe that a good breakfast is impor-tant for health．Eating breakfast at the __ 27 __ of the day, we have all been ． __ 28 __ , is as necessaryas putting gasoline in the family car __ 29 __ starting a trip．

But for many people the thought of food first in the morning is by __ 30 __ pleasures．So __ 31 __ all the efforts, they still take no __ 32 __ ．Between 1978 and 1983, the years for which figures are __ 33 __ ,the number of people who didn' t have breakfast increased __ 34 __ 33 percent from 8．8 million to 11．7 million __ 35 __ the Chinese-based Market Research Corporation of America．

For those who feel pain of __ 36 __ about not having breakfast, __ 37 __ , there is some goodnews．Several studies in the last few years __ 38 __ that, for adults especially, there may be nothing __ 39 __ with omitting breakfast．"Going __ 40 __ breakfast does not affect __ 41 __ "Said Arnold E．

Bendoer, former professor of nutrition at Queen Elizabeth College in London, __ 42 __ does givingpeople breakfast improve performance．

__ 43 __ evidence relating breakfast to better health or __ 44 __ ．performances is surprisingly inadequate, and most of the recent work involves children, not __ 45 __ "The literature," says one researcher, Dr．Ernesto Pollitt at the University of Texas,"is poor．"

第26题__________ 查看材料

A.about

B.into

C.up

D.from

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第5题

Show that the variance of the random variable X1–E(X1|X2) cannot be greater than the variance of X1, and that the two variances are equal if X1 and X2 are independent. This result shows how one random variable can be informative about another: Conditioning on it reduces variance unless the two variables are independent.

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第6题

Suppose that X and Y are two binary random variables. Their joint distribution is given in the following table. Y=0 Y=1 X=0 0.16 0.37 X=1 0.29 0.18 (1) What is the marginal distribution of Y ? (2) What is the distribution of Y conditional on X = 0? What is the distribution of Y conditional on X = 1? (3) Demonstrate the Law of Iterated Expectations explicitly by showing that E[E(X|Y)] = E(X). (4) Let h(Y) =. Show explicitly that E[Xh(Y)|Y] =h(Y)E(X|Y) in this case.

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第7题

Let a random variable X1 be distributed as N(0,1). Now suppose that a second random variable, X2, is constructed as the product of X1 and an independent random variable Z, which equals 1 with probability 1/2 and -1 with probability 1/2. (1)What is the (marginal) distribution of X2? (2)What is the covariance between X1 and X2? (3)What is the distribution of X1 conditional on X2?

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第8题

Which of the following belongs to the general methodology of modern economic research?

A、Data collection and summary of empirical stylized facts.

B、Development of economic theories/models.

C、Empirical verification of economic models.

D、All of the above

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第9题

Econometrics has witnessed a rather rapid development in the past several decades because

A、There is a need for empirical verification of economic theory

B、More and more high quality economic and finance data are available.