Roman Body Armor :: essays research papers

During the expansion of Rome and the acquisition of new territory, the Roman armies were often met by heavy resistance and bloody conflicts. The armies needed a type of protection that would safely protect soldiers and would ensure victory for Rome. That is the reason armour (upper body) in particular was implemented to save soldiers on the battlefield. The armour had to meet certain standards of construction for it to be useful: Of these standards the first was that armour was to be flexible enough to allow the wearer freedom of movement in battle. Secondly, it had to be lightweight it could be worn without wearing down the soldier, while still protecting him against an opponents' weapon: and finally, the armour had to be made at low cost. These three aspects were influential in the evolution of armour design in the Roman army. The main study point of Roman armour is that it was a trade off between freedom of movement, protection, and cost factor. In the first century A.D. there were about four types of armour in use. The names of the different types were muscle, scale, mail, and segmented mail and the segmented breastplate being the leading type. Studying of these armour types relies upon three main sources of evidence: iconographic; archaeological; and literary source documents. The evolution of Roman armour was influenced by the needs and circumstances of the Roman Army. Armies of the first century A.D. were finally established within the Empire and control fell solely under the Emperor. With the increase of soldiers in the Roman army, which was up to around thirty legions, well built armour was more in need than ever on the frontiers. The army could be divided into two distinct parts the legion and the auxiliary. Only Roman citizens could become a legionnaire, while the auxiliary were made of non citizens from Rome's settled territories. The early view put forward by a historian named Webster was that the equipment used by the legionnaires was remarkably uniform throughout the empire. However, there has been no evidence that supports this theory, showing that a great number of types and ages of equipment was in use at anyone time. Peterson argues that uniform armour in the Roman army may have only extended to the soldiers having their own body armour, helmet, weapons and shield showing a common trademark. Bishop and Coulston suggest that in this period soldiers purchased their own equipment.

Comparison Between Market Structures

A COMPARATIVE STUDY OF MARKET STRUCTURES Perfect Competition No. of Firms A large number, each being small. Monopolistic Competition A large number, each have some amount of market power. Oligopoly A small number, each being mutually interdependent. Monopoly Only one firm, possessing full control in the market. Size of Firms Small. Therefore each is a price taker. Relatively small but possessing some ability in setting price. Relatively big but bases its decision on other firms. Very large and is able to influence price or output but not both simultaneously. Nature of Product Homogeneous Differentiated Differentiated Unique Knowledge of Product Perfect knowledge of market by buyers and sellers Imperfect knowledge of market by buyers and sellers Imperfect knowledge of market by buyers and sellers Imperfect knowledge of market by buyers and sellers Barriers Free entry and exit from industry Free entry and exit from industry Barriers of entry and exit from industry Barriers of entry and exit from industry Mobility of Factors Perfect Mobility Perfect Mobility Imperfect Mobility Imperfect Mobility Extent of Price Control/Pricing Policy None by individual firms who take the market prevailing price Firms may either set price or output, constrained by its demand curve Firms may either set price or output, constrained by the actions of rival firms Firms may either set price or output, constrained by its demand curve Non-price Competition No advertising or other forms of promotion because of perfect competition †¢ Perfectly price elastic – each firm is a price taker because of all the above conditions †¢ D=P=AR=MR †¢ Price is constant at all levels of output †¢ The industry’s demand and supply determine the market price Advertising and other forms of promotion may take place Advertising and other forms of promotion may take place because of price rigidity †¢ Kinked demand curve – price rigidity exists because of all the above conditions †¢ D=AR and AR>MR †¢ The oligoplistic firm determines the market price or output, taking into account its competitor’s reaction No advertising or other forms of promotion because of the absence of competition †¢ Relatively price inelastic – firm is a price setter because of all the above conditions †¢ D=AR and AR>MR †¢ The monopolist determines the market price or output but not both simultaneously because it is constrained by the demand curve Demand Curve/Price Line/AR curve †¢ Relatively price elastic – each firm has some ability to set price because of all the above conditions †¢ D=AR and AR>MR †¢ The monopolistically competitive firm determines the market price or output but not both simultaneously because it is constrained by the demand curve 1 Perfect Competition Relationship between the demand curves of the Firm and Industry Price Price S P2 D1 D2 D0 P0 P1 AR2 AR0 AR1 Monopolistic Competition Demand Curve of the Firm $ Oligopoly Demand Curve of the Firm $ Monopoly Demand Curve of the Firm / Industry $ P2 P0 P1 MR Quantity Firm Quantity AR=DD Quantity MR AR=DD Quantity MR AR=DD Quantity Q1 Q0 Q2 Industry TR Curve †¢ TR = P x Q †¢ Because P is constant, TR curve is a linear upward-sloping from left to right Revenue Curves under Perfect Competition $ $ 60 TR †¢ TR = P x Q †¢ Because P falls when Q rises, TR curve is an inverted U-shape Revenue Curves under Monopolistic Competition $ †¢ TR = P x Q †¢ Because P falls when Q rises, TR curve is an inverted U-shape Revenue Curves under Oligopoly $ TR = P x Q †¢ Because P falls when Q rises, TR curve is an inverted U-shape Revenue Curves under Monopoly $ 10 AR=MR=DD AR=DD Quantity $ AR=DD Quantity MR Quantity 6 Quantity $ MR AR=DD Quantity $ MR TR Quantity TR Quantity TR Quantity MR Curve †¢ Identical to P and AR, that is, D=P=AR=MR †¢ Constant †¢ MR is less than AR, with the gradient of the MR curve twice as steep as the AR curve (implying that the MR cuts the quantity axis at half the length at which the AR cuts the quantity axis) †¢ Downward sloping, that is, is falling as quantity increases MR is less than AR, with the gradient of the MR curve twice as steep as the AR curve (implying that the MR cuts the quantity axis at half the length at which the AR cuts the quantity axis) †¢ Downward sloping, that is, is falling as quantity increases †¢ Presence of a broken line, implying the presence of price rigidity †¢ MR is less than AR, with the gradient of the MR curve twice as steep as the AR curve (implying that the MR cuts the quantity axis at half the length at which the AR cuts the quantity axis) †¢ Downward sloping, that is, is falling as quantity increases 2 Perfect Competition MC/AC Curves †¢ U-shaped in SR because of Law of Diminishing Returns †¢ U-shaped in LR because of internal economies and diseconomies of scale Monopolistic Competition †¢ U-shaped in SR because of Law of Diminishing Returns †¢ U-shaped in LR because of internal economies and diseconomies of scale Oligopoly †¢ U-shaped in SR because of Law of Diminishing Returns †¢ U-shaped in LR because of internal economies and diseconomies of scale Monopoly †¢ U-shaped in SR because of Law of Diminishing Returns †¢ U-shaped in LR because of internal economies and diseconomies of scale Profit-maximising Condition †¢ MR = MC where MC is rising (revenue from the last unit of output is equal to the cost of producing the last unit, therefore marginal profit is equal to zero) †¢ Since MR=P(=D=AR), when MR=MC, P=MC †¢ When individual firms no longer reshuffle output †¢ When maximum profits are attained †¢ SR equilibrium conditions are fulfilled, and †¢ No entry of new firms and no exit of existing firms †¢ MR = MC where MC is rising (revenue from the last unit of output is equal to the cost of producing the last unit, therefore marginal profit is equal to zero) †¢ Since P>MR, when MR=MC, P>MC MR = MC where MC is rising (revenue from the last unit of output is equal to the cost of producing the last unit, therefore marginal profit is equal to zero) †¢ Since P>MR, when MR=MC, P>MC †¢ MR = MC where MC is rising (revenue from the last unit of output is equal to the cost of producing the last unit, therefore marginal profit is equal to zero) †¢ Since P>MR, when MR=MC, P>MC Meaning of SR Equilibrium †¢ When individual firms no longer reshuffle output †¢ When maximum profits are attained †¢ SR equilibrium conditions are fulfilled, and †¢ No entry of new firms and no exit of existing firms When individual firms no longer reshuffle output †¢ When maximum profits are attained †¢ SR equilibrium conditions are fulfilled, and †¢ No entry of new firms and no exit of existing firms †¢ When individual firms no longer reshuffle output †¢ When maximum profits are attained †¢ SR equilibrium conditions are fulfilled, and †¢ No entry of new firms and no exit of existing firms Meaning of LR Equilibrium Profitability in SR †¢ Supernormal profits when the firm earns profits which are in excess of what is necessary to induce it to remain in the industry Supernormal Profits under Perfect Competition $ MC AC P0 Supernormal Profits †¢ Supernormal profits when the firm earns profits which are in excess of what is necessary to induce it to remain in the industry Supernormal Profits under Monopolistic Competition $ MC AC Supernormal Profits †¢ Supernormal profits when the firm earns profits which are in excess of what is necessary to induce it to remain in the industry Supernormal Profits under Oligopoly $ MC †¢ Supernormal profits when the firm earns profits which are in excess of what is necessary to induce it to remain in the industry Supernormal Profits under Monopoly $ MC AC Supernormal Profits AR=MR=DD P0 P0 AC Supernormal Profits P0 AR=DD MR Q0 Quantity Q0 Quantity Q0 MR AR=DD MR Quantity Q0 AR=DD Quantity 3 Perfect Competition †¢ Normal profits refers to that level of profits that is just sufficient to induce the firm to stay in the industry Normal Profits under Perfect Competition $ MC AC P0 AR=MR=DD Monopolistic Competition †¢ Normal profits refers to that level of profits that is just sufficient to induce the firm to stay in the industry Normal Profits under Monopolistic Competition $ MC AC P0 Oligopoly †¢ Normal profits refers to that level of profits that is just sufficient to induce the firm to stay in the industry Normal Profits under Oligopoly $ MC AC P0 Monopoly †¢ Normal profits refers to that level of profits that is just sufficient to induce the firm to stay in the industry Normal Profits under Monopoly $ MC AC P0 AR=DD MR Q0 Quantity Q0 Quantity Q0 MR AR=DD MR Quantity Q0 AR=DD Quantity †¢ Subnormal profits occur when the firm earns less profits than what is necessary to induce it to remain in the industry Subnormal Profits under Perfect Competition $ MC AC Subnormal profits occur when the firm earns less profits than what is necessary to induce it to remain in the industry Subnormal Profits under Monopolistic Competition $ AC MC Subnormal Profits †¢ Subnormal profits occur when the firm earns less profits than what is necessary to induce it to remain in the industry Subnormal Profits under Oligopoly $ MC AC Subnormal Profits †¢ Subnormal profits occur when the firm earns less profits than what is necessary to induce it to remain in the industry Subnormal Profits under Monopoly $ AC MC Subnormal Profits P0 Subnormal Profits AR=MR=DD P0 P0 P0 AR=DD MR Q0 Quantity Q0 Quantity Q0 MR AR=DD MR Quantity Q0 AR=DD Quantity Profitability in LR Necessarily makes normal profit because of free entry and exit from the industry †¢ Supernormal profits – beyond optimum capacity (Overutilisation where AC is rising) †¢ Normal profits – optimum capacity (Full utilisation where AC is at its minimum) †¢ Subnormal profits – below optimum capacity (Underutilisation where AC is falling) Necessarily makes normal profit because of free entry and exit from the industry †¢ Supernormal profits – below optimum capacity (Underutilisation where AC is falling) †¢ Normal profits – below capacity (Underutilisation where AC is falling) †¢ Subnormal profits – below optimum capacity (Underutilisation where AC is falling) Can be making either normal or supernormal profits because of the presence of entry to the industry †¢ Supernormal profits – below optimum capacity (Underutilisation where AC is falling) †¢ Normal profits – below capacity (Underutilisation where AC is falling) †¢ Subnormal profits – below optimum capacity (Underutilisation where AC is falling) Can be making either normal or supernormal profits because of the presence of entry to the industry †¢ Supernormal profits – below optimum capacity (Underutilisation where AC is falling) †¢ Normal profits – below capacity (Underutilisation where AC is falling) †¢ Subnormal profits – below optimum capacity (Underutilisation where AC is falling) Plant Utilisation in SR 4 Perfect Competition Plant Utilisation in LR Normal profits – optimum capacity (Full utilisation where AC is at its minimum) Monopolistic Competition Normal profits – below optimum capacity (Underutilisation where AC is falling) Oligopoly †¢ Normal profits – below optimum capacity (Underutilisation where AC is falling) †¢ Supernormal profits – below optimum capacity (Underutilisation where AC is falling) Monopoly †¢ Normal profits – below optimum capacity (Underutilisation where AC is falling) †¢ Supernormal profits – below optimum capacity (Underutilisation where AC is falling) Allocative Efficiency Allocative efficiency is attained where P=MC Allocative efficiency is NOT attained because P>MC Allocative efficiency is NOT attained because P>MC Allocative efficiency is NOT attained because P>MC EXCEPT when the monopolist is practising first degree (perfect) price discrimination Productive Efficiency (NEW vs OLD definition) NEW: Productive efficiency is attained where profit-maximising level of output is at the LRAC OLD: Productive efficiency is attained where profit-maximising level of output is at the minimum LRAC NEW: Productive efficiency is attained where profit-maximising level of output is at the LRAC OLD: Productive efficiency is NOT attained because profit maximising level of output is falling LRAC (underutilisation) NEW: Productive efficiency is attained where profit-maximising level of output is at the LRAC OLD: Productive efficiency is NOT attained because profit maximising level of output is falling LRAC (underutilisation) NEW: Productive efficiency is attained where profit-maximising level of output is at the LRAC OLD: Productive efficiency is NOT attained because profit maximising level of output is falling LRAC (underutilisation) Distinction between Firm and Industry †¢ Industry consists of many small firms producing an identical product. Therefore, there exists a distinction between firms and industry †¢ Firm’s demand curve is perfectly elastic because it is a price taker; industry’s demand curve is downward sloping †¢ SHORT-RUN – Price ? Average Variable Cost (Total Revenue ? Total Variable Cost) †¢ LONG-RUN – Price ? Average Total Cost (Total Revenue ? Total Cost) The portion of MC curve that is above the average variable cost †¢ Industry consists of many relatively small firms producing differentiated products. Therefore, there exists a distinction between firms and industry †¢ Firm’s demand curve and the industry’s demand curve is both downward sloping Industry consists of a few large firms producing differentiated products. Therefore, there exists a distinction between firms and industry †¢ Firm’s demand curve and the industry’s demand curve is kinked implying the presence of price rigidity †¢ Industry consists of only one firm producing a unique product. Therefore, there exists NO distinction between firms and industry †¢ Firm’s demand curve is the industry’s demand curve and it is downward sloping Shut-down condition †¢ SHORT-RUN – Price ? Average Variable Cost (Total Revenue ? Total Variable Cost) †¢ LONG-RUN – Price ? Average Total Cost (Total Revenue ? Total Cost) Cannot be determined because there is no unique price to a quantity and viceversa †¢ SHORT-RUN – Price ? Average Variable Cost (Total Revenue ? Total Variable Cost) †¢ LONG-RUN – Price ? Average Total Cost (Total Revenue ? Total Cost) Cannot be determined because of the presence of price rigidity †¢ SHORT-RUN – Price ? Average Variable Cost (Total Revenue ? Total Variable Cost) †¢ LONG-RUN – Price ? Average Total Cost (Total Revenue ? Total Cost) Cannot be determined because there is no unique price to a quantity and viceversa Supply Curve in SR 5

Affordable Care Act, Cultural Assessment Of The Hispanic...

Introduction It is important to understand how the Patient Protection and Affordable Care Act also know as the Affordable Care Act and usually referred to as the Obamacare affordable care act works and the functionality of it. The Affordable Care Act has insured over 20 million people, which was signed back in law in 2010 and signed by the 44th President Barack Obama. This paper will discuss various aspect of the Affordable Care Act, cultural assessment of the Hispanic group, and chapter six case study. Affordable Care Act The Affordable Care Act is a health care system that has insured over 20 million American that was uninsured. This is a law that was passed in 2010. There are three metal categories, which are Bronze, Silver, Gold, and Platinum. The metal categories are associated with the cost that the consumer will pay as well as the plan. It is also important to know that the quality of care remains the same for all four categories. 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