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Good for which demand increases more than what is proportional as income rises

In economics, a luxury good (or upmarket good) is a good for which demand increases more than what is proportional as income rises, so that expenditures on the good become a more significant proportion of overall spending. Luxury goods are in contrast to necessity goods, where demand increases proportionally less than income. Luxury goods is often used synonymously with superior goods.

The word "luxury" derives from the Latin verb luxor meaning to overextend or strain. From this, the noun luxuria and verb luxurio developed, "indicating immoderate growth, swelling, in persons and animals, willful or unruly behavior, disregard for moral restraints, and licensciousness", and the term has had negative connotations for most of its long history. One definition in the OED is a "thing desirable but not necessary". A luxury good can be identified by comparing the demand for the good at one point in time against the demand for the good at a different time, at a different income level. When personal income increases, demand for luxury goods increases even more than income does. Conversely, when personal income decreases, demand for luxury goods drops even more than income does. For example, if income rises 1%, and the demand for a product rises 2%, then the product is a luxury good. This contrasts with necessity goods, or basic goods, for which demand stays the same or decreases only slightly as income decreases. new product categories have been created within the luxury market, called "accessible luxury" or "mass luxury". These are meant specifically for the middle class, sometimes called the "aspiring class" in this context. Because luxury has diffused into the masses, defining the word has become more difficult. Whereas luxury often refers to certain types of products, luxury is not restricted to physical goods; services can also be luxury. Likewise, from the consumer perspective, luxury is an experience defined as "hedonic escapism".

"Superior goods" is the gradable antonym of "inferior good". If the quantity of an item demanded increases with income, but not by enough to increase the share of the budget spent on it, then it is only a normal good and is not a superior good. Consumption of all normal goods increases as income increases. For example, if income increases by 50%, then consumption will increase (maybe by only 1%, maybe by 40%, maybe by 70%). A superior good is a normal good for which the proportional consumption increase exceeds the proportional income increase. So, if income increases by 50%, then consumption of a superior good will increase by more than 50% (maybe 51%, maybe 70%). In economics terminology, all goods with an income elasticity of demand greater than zero are "normal", but only the subset having income elasticity of demand > 1 are "superior". Some articles in the microeconomics discipline use the term superior good as an alternative to an inferior good, thus making "superior goods" and "normal goods" synonymous. Where this is done, a product making up an increasing share of spending under income increases is often called an ultra superior good.

Though often verging on the meaningless in modern marketing, "luxury" remains a legitimate and current technical term in art history for objects that are especially highly decorated to very high standards and use expensive materials. The term is especially used for medieval manuscripts to distinguish between practical working books for normal use, and fully illuminated manuscripts, that were often bound in treasure bindings with metalwork and jewels. These are often much larger, with less text on each page and many illustrations, and if liturgical texts were originally usually kept on the altar or sacristy rather any library that the church or monastery who owned them may have had. Secular luxury manuscripts were commissioned by the very wealthy and differed in the same ways from cheaper books. "Luxury" and "luxury arts" may be used for other applied arts where both utilitarian and luxury versions of the same types of objects were made. This might cover metalwork, ceramics, glass, arms and armor, and various objects. It is much less used for objects from the fine arts, with no function beyond being an artwork: paintings, drawings, and sculpture, even though the disparity in cost between an expensive and cheap work may have been as large.

Luxury goods have high income elasticity of demand: as people become wealthier, they will buy proportionately more luxury goods. This also means that should there be a decline in income, its demand will drop more than proportionately. The income elasticity of demand is not constant with respect to income and may change signs at different income levels. That is to say, a luxury good may become a necessity good or even an inferior good at different income levels. Some luxury products have been claimed to be examples of Veblen goods, with a positive price elasticity of demand: for example, making a perfume more expensive can increase its perceived value as a luxury good to such an extent that sales can go up, rather than down. However, Veblen goods are not synonymous with luxury goods. Although the technical term luxury good is independent of the goods' quality, they are generally considered to be goods at the highest end of the market in terms of quality and price. Many markets have a luxury segment including, for example, luxury versions of automobiles, yachts, wine, bottled water, coffee, tea, foods, watches, clothes, jewelry, and high fidelity sound equipment. Luxuries may be services. Hiring full time or live in domestic servants is a luxury reflecting income disparities. Some financial services, especially in some brokerage houses, can be considered luxury services by default because persons in lower income brackets generally do not use them. Luxury goods often have special luxury packaging to differentiate the products from mainstream competitors.

The luxury goods market has been on an upward climb for many years. Apart from the setback caused by the 1997 Asian Financial Crisis, the industry has performed well, particularly in 2000. That year, the world luxury goods market was worth nearly $170 billion and grew 7.9 percent. The United States has been the largest regional market for luxury goods. The largest sector in this category was luxury drinks, including premium whisky, champagne, and cognac. The watches and jewelry section showed the strongest performance, growing in value by 23.3 percent, while the clothing and accessories section grew 11.6 percent between 1996 and 2000, to $32.8 billion. The largest ten markets for luxury goods account for 83 percent of overall sales and include Japan, China, United States, Russia, Germany, Italy, France, United Kingdom, Brazil, Spain, and Switzerland. In 2012, China surpassed Japan as the world's largest luxury market. China's luxury consumption accounts for over 25% of the global market. According to the Global Wealth and Lifestyle Report 2020, Hong Kong, Shanghai, Tokyo and Singapore were four of the five most expensive cities for luxury goods in Asia. In 2014, the luxury sector was expected to grow over the following ten years because of 440 million consumers spending a total of 880 billion euros, or $1.2 trillion.

The advertising expenditure for the average luxury brand is 5 15% of sales revenue, or about 25% with the inclusion of other communications such as public relations, events, and sponsorships. A rather small group in comparison, the wealthy tend to be extremely influential. Once a brand gets an "endorsement" from members of this group, then the brand can be defined as a true "luxury" brand. An example of different product lines in the same brand is found in the automotive industry, with "entry level" cars marketed to younger, less wealthy consumers, and higher cost models for older and more wealthy consumers.

In economics, superior goods or luxury goods make up a larger proportion of consumption as income rises, and therefore are a type of normal goods in consumer theory. Such a good must possess two economic characteristics: it must be scarce, and, along with that, it must have a high price. The scarcity of the good can be natural or artificial; however, the general population (i. e., consumers) must recognize the good as distinguishably better. Possession of such a good usually signifies "superiority" in resources and is usually accompanied by prestige. A Veblen good is a superior good with a prestige value so high that a price decline might lower demand. Veblen's contribution is demonstrated by the significance of the Veblen effect, which refers to the phenomenon of people purchasing costly items even when more affordable options that provide similar levels of satisfaction are available. The income elasticity of a superior good is above one by definition because it raises the expenditure share as income rises. A superior good may also be a luxury good that is not purchased below a certain income level. Examples would include smoked salmon, caviar,

Several manufactured products attain the status of "luxury goods" due to their design, quality, durability, or performance, which are superior to comparable substitutes. Some goods are perceived as luxurious by the public simply because they play the role of status symbols, as such goods tend to signify the purchasing power of those who acquire them. These items, while not necessarily being better (in quality, performance, or appearance) than their less expensive substitutes, are purchased with the main purpose of displaying wealth or income of their owners. These kinds of goods are the objects of a socio economic phenomenon called conspicuous consumption and commonly include luxury cars, watches, jewelry, designer clothing, yachts, private jets, corporate helicopters as well as large residences, urban mansions, and country houses.

The idea of a luxury brand is not necessarily a product or a price point, but a mindset where core values that are expressed by a brand are directly connected to the producer's dedication and alignment to perceptions of quality with its customers' values and aspirations. Thus, it is these target customers, not the product, that make a luxury brand. Furthermore, these brands must deliver – in some meaningful way – measurably better performance. Two additional elements of luxury brands include special packaging and personalization. and sales of €42.6 billion in 2017, Kering, which made €15.9 billion in revenue for a net income of €2.3 billion in 2019, and Richemont. The luxury brand concept is now so popular that it is used in almost every retail, manufacturing, and service sector. New marketing concepts such as "mass luxury" or "hyper luxury" further blur the definition of what is a luxury product, a luxury brand, or a luxury company. For example, luxury fashion houses partner with streetwear brands and video games.

Since the development of mass market "luxury" brands in the 1800s. Extraordinary places will be the factor of development that can be achieved by enabling the conversion of items from the mass market to the luxury market. Many innovative technologies are being added to mass market products and then transformed into luxury items to be placed in department stores. Department stores that sell major luxury brands have opened up in most major cities worldwide. Le Bon Marché in Paris, France is credited as one of the first of its kind. In the United States, the development of luxury oriented department stores not only changed the retail industry, but also ushered the idea of freedom through consumerism, and a new opportunity for middle and upper class women.