How to analyze when demand and supply change at the same time

Using the comparative static analysis method in economics to analyze (can be analyzed in graphs, I will describe it in words here) When endogenous variables do not change, and supply and demand change at the same time due to changes in exogenous variables, there are the following situations:

When supply and demand increase at the same time, and the increase in supply is greater than the increase in demand, the new equilibrium**.

will decrease and the number of equilibrium will increase; If the increase in supply is less than the increase in demand, the new equilibrium** will increase and the number of equilibrium will increase.

When supply and demand decrease at the same time, and the decrease in supply is greater than the decrease in demand, the new equilibrium** will rise The number of equilibrium will decrease When the decrease in supply is less than the decrease in demand, the new equilibrium** will decrease The number of equilibrium will decrease.

When supply increases and demand decreases If the increase in supply is greater than the decrease in demand The new equilibrium decreases The number of equilibrium increases If the increase in supply is less than the decrease in demand The new equilibrium decreases The number of equilibrium decreases.

When supply decreases and demand increases, if the decrease in supply is greater than the decrease in demand, the new equilibrium** rises The number of equilibrium decreases If the decrease in supply is less than the decrease in demand, the new equilibrium** rises The number of equilibrium rises.

The demand and supply curves can be analyzed on a coordinate graph, and an increase in demand means that the demand curve moves to the upper right, and vice versa, the demand curve moves to the lower left. An increase in supply means that the supply curve moves to the lower right, and vice versa, the supply curve moves to the upper left. Of course, the magnitude of the curve movement should also be taken into account.

No matter how it moves, an initial equilibrium point can be determined, and the demand curve and the supply curve after the move must intersect, that is, the new equilibrium point, the new equilibrium quantity and the equilibrium ** and the initial equilibrium quantity and equilibrium ** are compared, and the change situation is known at a glance, intuitive and clear.

Consider how exactly it will change, how much it will change, and what impact it will have on ** and quantity.

The change in the demand for a certain commodity caused by the change of the commodity ** is called the change in demand.

The change in supply refers to the change in the quantity of goods provided by manufacturers according to the changes in the commodity itself, that is, when other factors remain unchanged, the change in the supply caused by the change of the commodity itself is graphically manifested as the supply of the manufacturer always moving up and down along the same supply curve.

The change in demand refers to the change in the demand quantity of a commodity caused by changes in other factors under the condition that the commodity remains unchanged.

There are 4 situations in total: 1: demand increases, supply decreases: equilibrium quantity increases or decreases uncertainly, equilibrium**.

Increase 2: Demand decreases, supply increases: the equilibrium quantity increases or decreases uncertainly, and the equilibrium ** decreases by 3:

Demand increases, supply increases: equilibrium quantity increases, equilibrium ** uncertain increase or decrease 4: demand decreases, and supply decreases:

The number of equilibrium decreases, and the equilibrium** increases or decreases uncertainly.

Conclusion: 1: If demand and supply move in the opposite direction, the equilibrium** always changes in the direction of demand change, but the number of equilibrium is uncertain.

2: If demand and supply change in the same direction, the direction of change in equilibrium quantity is the same as that of supply and demand, and the increase or decrease of equilibrium ** depends on the degree of change in supply and demand. Extended Materials.

The relationship between market supply and demand is first of all determined by market value or production, and market value or production is the internal basis and entity of the formation and movement of the market, and is the center of market fluctuations, which regulates the market supply and demand, and the market supply and demand relationship reacts on the market and becomes the basic factor that dominates or affects the formation and movement of the market. Therefore, they influence and condition each other. The meaning of supply is that the supply side produces goods to the demand side, and the meaning of demand is the amount of money that the demand side buys the goods.

Supply includes the production process and the sales process, the production process corresponds to the production supply, and the sales process sales supply.

Demand is embodied in the demand curve, the product of a certain point ** and quantity on the demand curve is the point demand, and the set of all the point demand is the line demand.

The relationship between market supply and demand, the sales supply and the demand are determined, and the production supply is affected. Market supply and demand are the direct factors that determine the market, and the market is positively correlated with demand.

It is negatively correlated with the supply of sales.

The mathematical formula of the market**.

The model is: p=m q, p**, m demand, q sales supply.

The image model of the market ** is: the downward demand curve and the vertical supply line, and the intersection of the two lines is the market**.

Demand refers to the amount of money that the demander buys for the commodity. It consists of two conditions, namely, that the demander is willing to buy and has the ability to pay. If the demander does not have the ability to pay, even if there is some kind of use value.

desire, nor can it form an effective demand. Demand is generally expressed by the demand curve, and the product of ** and quantity at any point on the demand curve is the point demand. The quantity of goods that a certain demander is willing and able to buy is called the demand.

Choose C. It is a situation where the demand curve and the supply curve shift to the left at the same time.

Demand changes to.

The DU impact of the equilibrium price grid: when the demand increases, it will lead to the increase of the equilibrium price DAO grid, and the equilibrium output version will increase, and when the demand decreases, it will cause the equilibrium weight to decrease and the equilibrium output to decrease. In other words, changes in demand cause the equilibrium** to move in the same direction as the equilibrium output.

The impact of supply changes on equilibrium**: when the supply increases, it will cause the equilibrium ** to decrease and the equilibrium output to increase, and when the supply decreases, it will cause the equilibrium ** to rise and the equilibrium output to decrease. In other words, changes in supply cause changes in the opposite direction of equilibrium**, and equilibrium output changes in the same direction.

The impact of changes in supply and demand on sales volume.

Depends on the degree and direction of demand and supply changes:

The impact of demand changes on the equilibrium price is as follows: demand increases, equilibrium increases, and the equilibrium quantity increases

Add; The demand decreases, the equilibrium ** decreases, and the number of equilibrium decreases. The conclusion is that the change in demand causes the equilibrium ** to change in the same direction as the equilibrium quantity.

The impact of supply changes on equilibrium**: supply increases, equilibrium ** decreases, and the number of equilibrium increases; The supply decreases, the equilibrium ** rises, and the equilibrium quantity decreases. The conclusion is that the change in supply causes the change of equilibrium ** in the opposite direction, and the change of equilibrium quantity in the same direction.

When demand and supply change at the same time, how equilibrium** and equilibrium output change depends on the direction and degree of change in demand and supply.

When demand and supply increase at the same time, the equilibrium output increases, but the change of equilibrium ** cannot be determined; Conversely, the equilibrium output decreases, but the change in equilibrium** cannot be determined.

When demand increases and supply decreases, the equilibrium rises, and the change in equilibrium output cannot be determined; When demand decreases and supply increases, the equilibrium ** decreases, and the equilibrium output cannot be determined.

First of all, it must be clear that changes in supply and demand refer to the movement of the curve and not along it, so there are several possibilities for equilibrium.

2.Supply increases, demand decreases: the supply curve shifts to the right and the demand curve shifts to the left, at which point the equilibrium** decreases, but the output is uncertain.

3 Supply decreases and demand increases: the supply curve shifts to the left and the demand curve shifts to the right, and the equilibrium** increases, but the change in output is uncertain.

4 Decrease in supply and decrease in demand: Both the supply and demand curves shift to the left, and the equilibrium output declines, but the change is uncertain.

Draw a balance of supply and demand and its changes, and determine whether the following things involve the movement of the demand curve or the change in the quantity of demand:1Car sales rise as consumers increase; 2.

When the Pope allowed Catholics to eat meat on Fridays, the price of fish**; 3.imposing a tax on motor oil to reduce the sale of gasoline; 4.In the wake of a catastrophic wheat pest and disease, bread sales declined.

There are 8 types in total, and the different degrees of change in demand and supply will also affect the equilibrium**, slightly.