An endogenous variable is a variable explained by an economic model. An exogenous variable is a variable that is taken as given and is not explained by an economic model. True O False
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- Discuss the difference between endogenous and exogenous variables.E2 Describe the difference between the "endogenous" and the "exogenous" variables of an economic model. Which type of variable is, by construction, independent of all of the other variables in a model? In the supply/demand model of a competitive market which variables are endogenous and which are exogenous (give at least 3 of each type)?Differentiate between an exogenous variable and an endogenous variable in an economic model? Why isn’t it useful to construct an economic model that contains only exogenous variables (and no endogenous variables)?
- Which of the statements best describes an exogenous variable in an economic model? An exogenous variable is a variable whose value does not have a relationship with the other variables in the model. An exogenous variable is a variable whose value is not included in the model An exogenous variable whose value does not change as the state of the economy changes An exogenous variable is a variable whose value does change as the stae of the economy changesUsing sound economic theory, develop a macroeconomic econometric model that would test the relationshipbetween globalisation and economic development in South Africa. You are to state the a priori expectations ofwhat the model would tell us, and you are to write the model using ‘Word Equation’. Finally, each variable that isincluded must be justified regarding its relevance for being there.The demand and supply of pizza is defined by the following equations: Qd = D(P, Y ) = 1 + Y − 2P Qs = D(P, PM) = 2 P/PM where, Qd is quantity demand, P is the price of each pizza sold, Y is the average income of consumers, Qs is the quantity supplied, and Pm is the price of inputs used in the production of pizza. (a) List the endogenous and exogenous variables of this model (b) Find the equilibrium price Pe and quantity Qe of pizza as a function of the exogenous variables. (c) Use a simple demand and supply diagram to show what happens to the equilibrium price and quantity when there is an increase in one of the exogenous variables.
- ) Consider the following IS-LM model set upC = 300 + 0.8(Y − 2500)I = 3500 − 400(r)G = 3000T = 2500(M/P)s = 2600Md = 2000 −1000(r) + 0.2(Y)(a) Using the IS equation, if r is 3 howmuch is Y?(b) Using the LM equation, if Y is 19000how much is r? (c) Find equilibrium r and Y, andplot IS-LM equilibriumBy using the concept of the Heckscher-Ohlin model, and information assumptionsbelow this i. Two factors of production, namely Labor and Landii. Two production goods, namely Cloth and Foodiii. Cloth production is labor intensiveiv. Food production is land intensivev. The rest are other HO assumptionsvi. aLC, aTC, aLF, aTF, and a*LC, a*TC, a*LF, a*TF areLabor and Land input units used for the production of eacheach Cloth and Foodvii. w is the factor price of Labor and r is the factor priceLand production a) Show that Cloth is a commodity that is labor intensive and Foodis a land intensive commodity?k) According to the Stolper-Samuelson Theorem, an increase in the relative price of outputPC/PF, how does it affecta) The relative income of the factors of production Labor and Land or w/r?b) Land/Labor Ratio? l) According to the H-O Model, a country has a comparative advantagein producing a commodity when? Give an example. m) According to Rybczynski theorem with an increase in the factor of…The basic difference between macroeconomics and microeconomics is that? a.macroeconomics is concerned with policy decisions, while microeconomics applies only to theory. b.microeconomics is concerned with the forest (aggregate markets), while macroeconomics is concerned with the trees (subcomponents). c.macroeconomics is concerned with the forest (aggregate markets), while microeconomics is concerned with the individual trees (subcomponents). d.opportunity cost is applicable to macroeconomics, and the fallacy of composition relates to microeconomics.
- The South African Rand flactuates widly on a daily, weekly, monthly basis. Identify all the variables that would be used in an econometric equation that estimates the relationship between South african economic growth and exchange rates (dollar to rand). appraise each variable that is included in the model using economics theory and briefly discuss the tests used to ensure model is statistically sound.On a microeconomic demand curve, a decrease in price causes an increase in quantity demanded because the product in question is now relatively less expensive thansubstituteproducts.Explainwhyaggregatedemand does not increase for the same reason in response to a decrease in the aggregate price level. In other words, whatcausestotalspendingtoincreaseifitisnotbecause goods are now cheaper?What is the difference between a positive and a normative statement?
