Introduction 4
- Lecture1.1
  
  Introduction
- Lecture1.2
  
  Downloading Jupyter Notebook
- Lecture1.3
  
  Basic Python
- Lecture1.4
  
  Challenge Solution
Production Possibilities Frontier 4
- Lecture2.1
  
  Introduction
- Lecture2.2
  
  Loops
- Lecture2.3
  
  Production Possibilities Frontier
- Lecture2.4
  
  Solution
Trade 3
- Lecture3.1
  
  Introduction
- Lecture3.2
  
  Trade
- Lecture3.3
  
  New Production Possibilities Frontier
Demand 4
- Lecture4.1
  
  Introduction
- Lecture4.2
  
  Introduction to Demand
- Lecture4.3
  
  The Demand Schedule
- Lecture4.4
  
  Shifts Along the Demand Line
Supply 2
- Lecture5.1
  
  Introduction
- Lecture5.2
  
  Supply Schedule
Equilibrium 4
- Lecture6.1
  
  Introduction
- Lecture6.2
  
  Introducing Sympy
- Lecture6.3
  
  Equilibrium
- Lecture6.4
  
  Surplus and Shortage
Curve Movements 4
- Lecture7.1
  
  Introduction
- Lecture7.2
  
  Introducing Functions
- Lecture7.3
  
  Creating the Equilibrium Function
- Lecture7.4
  
  Creating the Shift Function
Elasticity and Revenue 5
- Lecture8.1
  
  Introduction
- Lecture8.2
  
  Elasticity Equation
- Lecture8.3
  
  Elasticity
- Lecture8.4
  
  Mapping Revenue
- Lecture8.5
  
  Solution
Taxes 7
- Lecture9.1
  
  Introduction
- Lecture9.2
  
  Solving for Two Different Prices
- Lecture9.3
  
  Solving for Two Different Prices Part 2
- Lecture9.4
  
  Plotting the Tax Model
- Lecture9.5
  
  Plotting the Tax Model Part 2
- Lecture9.6
  
  Tax Incidence
- Lecture9.7
  
  Solution
Consumer and Producer Surplus 8
- Lecture10.1
  
  Introduction
- Lecture10.2
  
  Creating a Class
- Lecture10.3
  
  Creating a Class Part 2
- Lecture10.4
  
  If Statements
- Lecture10.5
  
  Surplus Basics
- Lecture10.6
  
  Surplus Basics Part 2
- Lecture10.7
  
  Plotting Surplus
- Lecture10.8
  
  Plotting Surplus Part 2
Imports and Exports 4
- Lecture11.1
  
  Introduction
- Lecture11.2
  
  Creating a Supply and Demand Class
- Lecture11.3
  
  Creating the International Functionality
- Lecture11.4
  
  Plotting Surplus
Tariffs 2
- Lecture12.1
  
  Introduction
- Lecture12.2
  
  Solution

Solution

import sympy
import matplotlib.pyplot as plt
import matplotlib.patches as patches
p = sympy.Symbol("p")
class tariffModel:
    def __init__(self,demandEquation,supplyEquation,worldPrice,tariff):
        self.demandEquation = demandEquation
        self.supplyEquation = supplyEquation
        self.priceEnd = sympy.solve(demandEquation)[0]
        self.prices = []
        self.demandQ = []
        self.supplyQ = []
        for price in range(0,self.priceEnd+1):
            self.prices += [price]
            self.demandQ += [demandEquation.subs(p,price)]
            self.supplyQ += [supplyEquation.subs(p,price)]
        self.startingQ = sympy.solve(demandEquation-supplyEquation)[0]
        self.startingP = demandEquation.subs(p,self.startingQ)
        self.mode = "Normal"
        self.worldPrice = worldPrice
        self.tariff = tariff
        self.Q11 = supplyEquation.subs(p,worldPrice+tariff)
        self.Q21 = supplyEquation.subs(p,worldPrice)
        self.Q12 = demandEquation.subs(p,worldPrice+tariff)
        self.Q22 = demandEquation.subs(p,worldPrice)


    def plot(self):
        plt.plot(self.demandQ,self.prices,'k')
        plt.plot(self.supplyQ,self.prices,'k')
        plt.plot(self.startingQ,self.startingP, 'bo')
        plt.plot([0,self.priceEnd],[self.worldPrice,self.worldPrice],'b',label="World Price")
        plt.plot([0,self.priceEnd],[self.worldPrice+self.tariff,self.worldPrice+self.tariff],'r',label="World Price+Tariff")
        plt.xlabel("Supply and Demand Quantity")
        plt.ylabel("Price")


        triangle1 = patches.Polygon([[self.Q12,self.worldPrice+self.tariff],[0,self.priceEnd],[0,self.worldPrice+self.tariff]],True,label="Consumer Surplus", color="blue")
        triangle2 = patches.Polygon([[self.Q21,self.worldPrice],[0,0],[0,self.worldPrice]],True,label="Original Producer Surplus", color="red")
        polygon1 = patches.Polygon([[self.Q21,self.worldPrice],[self.Q11,self.worldPrice+self.tariff],[0,self.worldPrice+self.tariff],[0,self.worldPrice]],True,label="Additional Producer Surplus", color="orange")
        rectangle1 = patches.Polygon([[self.Q11,self.worldPrice+self.tariff],[self.Q12,self.worldPrice+self.tariff],[self.Q12,self.worldPrice],[self.Q11,self.worldPrice]],True,label="Money Raised", color="yellow")
        dead1 = patches.Polygon([[self.Q21,self.worldPrice],[self.Q11,self.worldPrice+self.tariff],[self.Q11,self.worldPrice]],True,label="Deadweight Loss", color="grey")
        dead2 = patches.Polygon([[self.Q22,self.worldPrice],[self.Q12,self.worldPrice+self.tariff],[self.Q12,self.worldPrice]],True,label="Deadweight Loss", color="grey")

        currentAxis = plt.gca()
        currentAxis.add_patch(triangle1)
        currentAxis.add_patch(triangle2)
        currentAxis.add_patch(polygon1)
        currentAxis.add_patch(rectangle1)
        currentAxis.add_patch(dead1)
        currentAxis.add_patch(dead2)
        plt.legend()
        plt.show()
economy1 = tariffModel(10-p,p,3,1)
economy1.plot()

Source Code

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Economics

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Economics

Introduction 4

Production Possibilities Frontier 4

Trade 3

Demand 4

Supply 2

Equilibrium 4

Curve Movements 4

Elasticity and Revenue 5

Taxes 7

Consumer and Producer Surplus 8

Imports and Exports 4

Tariffs 2

Solution

Solution

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