The idea of want can be examined from many perspectives. In secular societies want might be considered similar to the emotion desire, which can be studied scientifically through the disciplines of psychology or sociology. Alternatively want can be studied in a non-secular, spiritual, moralistic or religious way, particularly by Buddhism but also Christianity, Islam and Judaism.
In philosophy it corresponds to appetition or concupiscence.
A need is a deficiency at a point of time and in a given context. Needs are distinguished from wants. In the case of a need, a deficiency causes a clear adverse outcome: a dysfunction or death. In other words, a need is something required for a safe, stable and healthy life (e.g. air, water, food, land, shelter) while a want is a desire, wish or aspiration. When needs or wants are backed by purchasing power, they have the potential to become economic demands.
Basic needs such as air, water, food and protection from environmental dangers are necessary for an organism to live. In addition to basic needs, humans also have needs of a social or societal nature such as the human need for purpose, to socialize, to belong to a family or community or other group. Needs can be objective and physical, such as the need for food, or psychical and subjective, such as the need for self-esteem. Understanding both kinds of "unmet needs" is improved by considering the social context of their not being fulfilled.
Commerce is the organized system of activities, functions, procedures and institutions that directly or indirectly contribute to the smooth, unhindered exchange of goods, services, and other things of value—predominantly through transactional processes—at the right time, place, quantity, quality and price through various channels among the original producers and the final consumers within local, regional, national or international economies. The diversity in the distribution of natural resources, differences of human needs and wants, and division of labour along with comparative advantage are the principal factors that give rise to commercial exchanges.
Commerce consists of trade and aids to trade (i.e. auxiliary commercial services) taking place along the entire supply chain. Trade is the exchange of goods (including raw materials, intermediate and finished goods) and services between buyers and sellers in return for an agreed-upon price at traditional (or online) marketplaces. It is categorized into domestic trade, including retail and wholesale as well as local, regional, inter-regional and international/foreign trade (encompassing import, export and entrepôt/re-export trades). The exchange of currencies (in foreign exchange markets), commodities (in commodity markets/exchanges) and securities and derivatives (in stock exchanges and financial markets) in specialized exchange markets, typically operating under the domain of finance and investment, also falls under the umbrella of trade. On the other hand, auxiliary commercial activities (aids to trade) which can facilitate trade include commercial intermediaries, banking, credit financing and related services, transportation, packaging, warehousing, communication, advertising and insurance. Their purpose is to remove hindrances related to direct personal contact, payments, savings, funding, separation of place and time, product protection and preservation, knowledge and risk.
Desires are states of mind that are expressed by terms like "wanting", "wishing", "longing" or "craving". A great variety of features is commonly associated with desires. They are seen as propositional attitudes towards conceivable states of affairs. They aim to change the world by representing how the world should be, unlike beliefs, which aim to represent how the world actually is. Desires are closely related to agency: they motivate the agent to realize them. For this to be possible, a desire has to be combined with a belief about which action would realize it. Desires present their objects in a favorable light, as something that appears to be good. Their fulfillment is normally experienced as pleasurable in contrast to the negative experience of failing to do so. Conscious desires are usually accompanied by some form of emotional response. While many researchers roughly agree on these general features, there is significant disagreement about how to define desires, i.e. which of these features are essential and which ones are merely accidental. Action-based theories define desires as structures that incline us toward actions. Pleasure-based theories focus on the tendency of desires to cause pleasure when fulfilled. Value-based theories identify desires with attitudes toward values, like judging or having an appearance that something is good.
Desires can be grouped into various types according to a few basic distinctions. Intrinsic desires concern what the subject wants for its own sake while instrumental desires are about what the subject wants for the sake of something else. Occurrent desires are either conscious or otherwise causally active, in contrast to standing desires, which exist somewhere in the back of one's mind. Propositional desires are directed at possible states of affairs while object-desires are directly about objects. Various authors distinguish between higher desires associated with spiritual or religious goals and lower desires, which are concerned with bodily or sensory pleasures. Desires play a role in many different fields. There is disagreement whether desires should be understood as practical reasons or whether we can have practical reasons without having a desire to follow them. According to fitting-attitude theories of value, an object is valuable if it is fitting to desire this object or if we ought to desire it. Desire-satisfaction theories of well-being state that a person's well-being is determined by whether that person's desires are satisfied.
Consumer behaviour is the study of individuals, groups, or organisations and all activities associated with the purchase, use and disposal of goods and services. It encompasses how the consumer's emotions, attitudes, and preferences affect buying behaviour, and how external cues—such as visual prompts, auditory signals, or tactile (haptic) feedback—can shape those responses. Consumer behaviour emerged in the 1940–1950s as a distinct sub-discipline of marketing, but has become an interdisciplinary social science that blends elements from psychology, sociology, social anthropology, anthropology, ethnography, ethnology, marketing, and economics (especially behavioural economics).
The study of consumer behaviour formally investigates individual qualities such as demographics, personality lifestyles, and behavioural variables (like usage rates, usage occasion, loyalty, brand advocacy, and willingness to provide referrals), in an attempt to understand people's wants and consumption patterns. Consumer behaviour also investigates on the influences on the consumer, from social groups such as family, friends, sports, and reference groups, to society in general (brand-influencers, opinion leaders).