19th Ave New York, NY 95822, USA

# 经济代写|The need for discipline宏观经济学代写

## 经济代写

Economic facts surround us, be it the price we pay for a ride in the autorickshaw, the valuc of our shopping cxpenscs at the local vegctable markct, the number of hours we spend at work, the number of hours of household work or the number of people who look for jobs daily. How do we decide which prices and quantitics to focus on? Is it possiblc to proccss facts unaidcd? Or do wc rcquirc some sort of a disciplining device akin to a sieve to sift through facts or a lens role-by informing its student which of the key economic aspects to focus their attention upon. Often, these aspects are not directly observable, and will need to be measured or computed by the process of estimation or imputation. For instance, aggregate output (Y) is not directly observable, but, as we have noted in Chapters 4 and 5, it provides a useful indicator of the activity levels in an economy. Similarly, although we are able to see that people purchase food items,
WHY ECONOMIC THEORY MATTERS
consumer durables and transportation, the relevant macroeconomic variable is aggregate consumption (C)-a directly non-observable variable. Indeed, the appropriate aphorism that captures the power/ability of theory to make sense of a vast amount of economic information is one that is commonly attributed to (but does not originate from) the psychologist Kurt Lewin: “There is nothing as practical as a good theory.”
Section $1.4$ outlined the importance of theoretical precision in relation to understanding equilibrium tendencies of the economic system and in making definitive statements. A theory can be viewed as a conceptual framework to understand phenomena. And it is the disciplining nature of a theory that aids us in making definitive statements. Very frequently, a model is constructed to in Chapter 5, is a particular application of supply-side growth theory.

The use of mathematics renders clarity to the model by showing the restrictions that are necessary to arrive at the equilibrium outcome. If these logically necessary conditions are too restrictive from an economic standpoint, it could be concluded that the model in question is not very useful in understanding the economy. For example, if one of the restrictions to arrive at an economic equilibrium is that the price of a commodity has to be negative, then we realise that there is some problem. And often, it is difficult to identify these restrictions without employing mathematics. But do note that depending other branches of mathematics. If a theory does not use marginal concepts such as marginal utility and marginal cost, do the models warrant the use of calculus? Calculus is the study of change and in the context of marginalist economics, it transforms into an analysis of potential and not actual change (for instance, marginal product of labour refers to the addition to total output when it is supposed that one more labour input is added to the process of production, ceteris paribus). The kind of mathematics employed, therefore, depends on the nature of economic theory. For a history of economics with special attention devoted to its use of mathematics, you can read
To illustrate the above point, let us model the Keynesian theory of output and employment (already detailed in Section 4.2) for a two-sector economy with households and firms. Households provide labour services to firms in return for wages. And most of these wages are spent on consumption needs. The firms utilise a part of their profits for investment-leading to an increase
117
MACROECONOMICS
in the rate of utilisation of capacity. Recall that the productive capacity is taken as a given in the theories of output and employment. And that the equilibrium or position of rest in this macroeconomy occurs when planned aggregate output (Y) coincides with planned aggregate demand (AD). At this point, neither the households nor the firms have an incentive to revise their economic plans.

\

117

## 经济代考

my-assignmentexpert愿做同学们坚强的后盾，助同学们顺利完成学业，同学们如果在学业上遇到任何问题，请联系my-assignmentexpert™，我们随时为您服务！

## 编码理论代写

1. 数据压缩（或信源编码
2. 前向错误更正（或信道编码
3. 加密编码
4. 线路码

## 复分析代考

(1) 提到复变函数 ，首先需要了解复数的基本性左和四则运算规则。怎么样计算复数的平方根， 极坐标与 $x y$ 坐标的转换，复数的模之类的。这些在高中的时候囸本上都会学过。
(2) 复变函数自然是在复平面上来研究问题，此时数学分析里面的求导数之尖的运算就会很自然的 引入到复平面里面，从而引出解析函数的定义。那/研究解析函数的性贡就是关楗所在。最关键的 地方就是所谓的Cauchy一Riemann公式，这个是判断一个函数是否是解析函数的关键所在。
(3) 明白解析函数的定义以及性质之后，就会把数学分析里面的曲线积分 $a$ 的概念引入复分析中， 定义几乎是一致的。在引入了闭曲线和曲线积分之后，就会有出现复分析中的重要的定理: Cauchy 积分公式。 这个是易分析的第一个重要定理。