3.3 Flashcards

(60 cards)

1
Q

State the formula of Total Revenue

A

TR = P x Q

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2
Q

What is a price maker?

A

It is a firm that has sufficient market power to set its own price rather than taking market price. This happens because the firm faces a downwards sloping demand curve. As a result it can increase price but this reduces quantity demanded. It can decrease price to sell more but this reduces revenue per unit. The firm is operating in an imperfectly competitive market.

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3
Q

What does the TR graph for a price maker look like. (revenue against quantity)

A

The TR curve is a parabola shape

Price is still high so initially TR increases as TR = P x Q so when quantity increases, TR increases. TR then reaches Maximum revenue as the PED = 1. TR the declines as the fall in price outweighs the increase in quantity.

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4
Q

What is a price taker?

A

A price taker is a firm that has no control over the market price and must accept the price set by supply and demand. The firms face a horizontal demand curve meaning the firms can change the quantity sold but not the price or else they will loose all their customers. Price takers are typically found in perfect competition, where there are many small firms, identical products, and no barriers to entry.

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5
Q

What is the Formula for Average Revenue

A

AR = TR/Q

AR = P x Q/Q

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6
Q

What is Average Revenue?

A

Average revenue is the amount a firm receives per unit sold. It is another word for price. A firms average revenue curve is also its demand curve.

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7
Q

Describe the Average revenue graph for a price Taker.

A

AR is horizontal.

An example is a fishing boat captain who who brings his catch into the ports in the mornings. The price he gets for the fish depends entirely on the supply and demand for that fish at that particular port, and the fisherman has to accept the price offered.

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8
Q

Describe the Average revenue graph for a price Maker.

A

AR is downwards sloping.

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9
Q

What is Marginal Revenue?

A

It is the amount a firm receives for selling one extra unit of output.

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10
Q

What is the formula for MR?

A

MR = Change in TR / Change in quantity sold.

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11
Q

Describe the MR graph for a Price Taker

A

MR is horizontal and equal to AR

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12
Q

Describe the MR graph for a price Maker

A

The MR curve is downwards sloping. It has a gradient twice as steep as the AR curve

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13
Q

Why is the MR curve downwards sloping for a price Maker?

A

It is because the firm faces a downwards sloping demand curve. This means that to sell more the firm most lower their price. The firm gains revenue from selling more units however it looses revenue due to the lower price. Thus MR decreases.

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14
Q

Why is the MR curve horizontal for a price taker

A

because every additional unit brings in the same revenue as the last one.

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15
Q

Define PED

A

It is a measure of the responsiveness of quantity demanded due to a change in price.

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16
Q

What is the formula for PED ?

A

Percentage change in quantity demanded / percentage change in price

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17
Q

Explain the relationship between PED and the average revenue curve

A

At high prices demand is elastic (PED > 1) lowering price increases TR, as the percentage increase in quantity demanded is greater than the percentage decrease in price.

At midpoint of the AR curve, demand is unit elastic (PED = 1) → TR is maximized, as price changes do not affect total revenue.

At low prices (high quantity), demand is inelastic (PED < 1) → lowering price decreases TR, as the percentage increase in quantity is smaller than the percentage drop in price.

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18
Q

What is the formula for Total Cost?

A

TC = TFC + TVC

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19
Q

What are TVC?

A

Costs that change when output changes.
For example raw materials.

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20
Q

What are TFC ?

A

Costs that do not change when output changes.
For example rent

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21
Q

What is the formula for Total Fixed Cost?

A

TFC = TC - TVC

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22
Q

What is the formula for Total Variable cost?

A

TVC = TC - TFC

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23
Q

What is the formula for Average cost?

A

AC = TC/Q

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24
Q

What is the formula for Average Fixed cost?

A

AFC = TFC/Q

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25
What does the AC curve look like?
A U shape.
26
What is the formula for Average variable cost?
AVC = TVC/Q
27
What is marginal cost?
It is the cost of making an additional unit of output.
28
What is the formula for marginal cost?
MC = Change in TC / Change in Q
29
What does the MC Curve look like?
Initially downwards sloping until it reaches a minimum, it is then upwards sloping. (like a u shape however the duration of upwards slope is greater than the downwards slope)
30
What does it mean when marginal cost is below average cost?
The cost of producing the next unit is less than the average cost of producing a unit. Therefore this extra unit produced brings down the average cost.
31
What does it mean when marginal cost is above average cost?
The cost of producing the next unit is more than the average cost of producing a unit. Therefore the extra unit produced causes the average cost to rise.
32
At what point of the AC curve does the MC curve intersect it?
When AC is at its lowest.
33
What is the law of diminishing marginal returns?
As more units of a variable factor are added to a fixed factor the increase in output eventually falls. (in the short run)
34
What is marginal product?
It is the extra output when more unit of the variable factor is added.
35
Describe the story of an apple farmer to explain the law of diminishing marginal returns
A farmer has an orchard of 200 apple trees. The farmer measures his marginal product in terms of baskets of apples. These increase as he hires more labourers to pick the apples. The fixed factor is the orchard, the variable factor is the workers. When an additional worker is taken on, more than double the quantity of apples may be picked because of the cooperation and teamwork involved. However with additional workers being employed the increase in output begins to decline (marginal product falls and marginal cost increases) This is because the apples are harder to pick. When the employment of an additional worker causes a fall in marginal product, diminishing marginal returns set in. It only operates in the short run as in the long run the farmer can plant more apple trees.
36
What is total product?
The total output of a firm in a given period of time.
37
What is average product?
It is the unit of output produced per unit of variable factor of production. AP = TP/Q
38
How do you calculate Marginal product?
MP = change in TP / Change in Q
39
What is the relationship between MP and MC? explain why they have this relationship.
When MP is rising, MC is falling. When MP is falling MC is rising. This is because when MP is high it means each input adds a high level of output as a result its cheap to make extra units resulting in a low MC. When MP falls each unit adds less output thus it becomes more expensive to make extra units and MC rises.
40
What is the relationship with AP and AVC?
When AP is rising AVC is falling. When AP is falling AVC is rising. This is because if AP is high each worker is producing a lot, it takes fewer workers to produce each unit and AVC is low.
41
Explain the relationship between short run and long run average cost curves.
It the short run at least one factor of production is fixed. Thus the SRAC curves are U shaped due to increasing and diminishing marginal returns. Whereas in the long run all factors of production are variable, meaning the firm can adjust machinery and workforce. The LRAC curve is formed from all the lowest points of the SRAC curves. The LRAC curve is U shaped due to economies and diseconomies of scales. The LRAC curve shows the lowest possible cost at each output level when all inputs are variable, while each SRAC curve represents short-run constraints where at least one input is fixed. The shape is one big U with multiple small Us within it.
42
What are Economies of scale?
They are the costs advantages firms gain when they increase their output. When increasing output decreases LRAC.
43
What are internal economies of scale?
Internal economies of scale refer to the cost advantages a firm can achieve as a result of its own growth and expansion. These cost reductions are generated from within the firm itself, primarily by optimizing its production processes and utilizing its resources more efficiently.
44
What are the 6 Types of internal Economies of scale? Explain each.
1- Technical Economies: As a firm grows, it may invest in better machinery and technology, leading to increased efficiency and reduced production costs per unit. 2- Marketing Economies: As a firm grows bigger the cost of advertising is spread out over a larger volume of products 3- Commercial Economies: Large firms are able to bulk buy from their suppliers and negotiate lower prices thus decreasing costs per unit and increasing profitability. 4- Managerial Economies: Larger firms can increase efficiency by employing highly skilled and more experienced managers, who specialise in managing particular parts of the business. 5- Financial Economies: Bigger firms may have better access to capital markets, enabling them to secure loans at lower interest rates. 6- Risk-bearing Economies: Large firms can spread risks by diversification. They can sell a wider range of goods.
45
What is the Minimum efficient scale (MES)?
It is the output in which the long run average costs are at a minimum.
46
When do Constant returns to scale occur?
They occur when an increase in the scale of production results in an exactly proportional increase in output. As a result the LRAC curve will be horizontal.
47
What are diseconomies of scale?
When an increase in output results in an increase Average costs.
48
What are the reasons Diseconomies of scale may occur?
1- Poor communication: communication between managers and workers may become complex. This may result in time delays and workers having less clear instructions from management about what they are supposed to do when. 2- Demotivation: Large businesses tend to be impersonal and workers may not feel valued. This could result in a decrease in productivity and efficiency of employees. 3- X-Inefficiency: As a firm increases in size, administration costs may increase disproportionally. 4- Poor co-ordination: Large firms can become difficult to manage. Coordinating production decisions across a large organisation may result in productivity falling and average costs increasing.
49
When do External Economies of scale occur?
When a whole industry grows larger and firms in that industry benefit from lower long run average costs.
50
What are examples of external economies of scale?
1- Skilled Labour Pool: If multiple firms in a specific industry cluster in a region, a skilled labour force with industry-specific expertise may develop. All firms in the industry can benefit from this shared resource, as it reduces labour training costs. 2- Specialised Suppliers: When several firms in an industry are located close to each other, specialized suppliers may emerge to serve them. These suppliers can provide specialized inputs at lower costs due to proximity. 3- Infrastructure: The development of transportation and communication infrastructure in a region with a concentration of firms can benefit all companies by reducing transportation costs and improving connectivity.
51
When does profit maximisation occur?
When MR = MC, meaning the firm is not able to increase its profits.
52
What is Normal Profit?
It is where a firm makes sufficient revenue to cover its total costs and remain competitive within the industry.
53
When does normal profit occur?
When AC = AR or TC = TR
54
What is Supernormal profit?
Supernormal profit occurs when a firm's total revenue (TR) exceeds its total cost (TC). In other words, the firm is earning more than enough to cover all costs, including the opportunity cost of the resources used.
55
What is the disadvantage of a firm making supernormal profit?
Supernormal attracts competition into the market which can drive down prices and reduce profit in the long run.
56
When does a loss occur?
When a firms total costs exceed revenues. TC > TR. Or when the average cost of production is greater than the price per unit.
57
What is the break-even level of output?
It is the output at which total costs are equal to total revenue and average costs are equal to average revenue. TC = TR and AC = AR
58
What is the short run shut down point?
AR < AVC.
59
What is the long run shut down point?
TR < TC
60
Why is the short run shut down point where it is?
If AVC < AR then firms should continue production. Each good they make will generate more revenue than it costs for them to make it, and so this will help them to reduce the size of the loss by covering some of the fixed cost. However when AVC > AR then producing more goods will increase the loss. As a result they should leave the industry. Fixed costs arenet considered as they are sunk.