Title: Ersatz good
Content:  An ersatz good is a substitute good, especially one that is considered inferior to the good it replaces. It has particular connotations of wartime usage.
Title: Ersatz good
Content:  When people are asked to choose an ersatz good, they tend to prefer a substitute from the same category as the good they desire to a goal-derived substitute, one that meets the same goal. For instance, a person who desires a gourmet chocolate is more likely to choose another, less expensive chocolate as a substitute than a different kind of dessert or snack. Because such "within-category" substitutes are easier to compare to the desired good, however, those that are inferior are less effective than "cross-category" substitutes that fulfil the same goal. People are more able to notice their inferiority during consumption, which leads them 
Title: Substitute good
Content:  In microeconomics, two goods are substitutes if the products could be used for the same purpose by the consumers. That is, a consumer perceives both goods as similar or comparable, so that having more of one good causes the consumer to desire less of the other good. Contrary to complementary goods and independent goods, substitute goods may replace each other in use due to changing economic conditions. An example of substitute goods is Coca-Cola and Pepsi; the interchangeable aspect of these goods is due to the similarity of the purpose they serve, i.e fulfilling customers' desire for a soft drink. These types of substitutes can be referred to as close substitutes.
Title: Substitute good
Content:  be expected to substitute Pepsi. However, many consumers prefer one brand over the other. Consumers who prefer one brand over the other will not trade between them one-to-one. Rather, a consumer who prefers Coca-Cola (for example) will be willing to exchange more Pepsi for less Coca-Cola. The degree to which a good has a perfect substitute depends on how specifically the good is defined. The broader the definition of a good, the easier it is for the good to have a substitute good. On the other hand, a good narrowly defined will be likely to not have a substitute good. For example, different types of cereal generally are substitutes for each other, but Rice Krispies cereal, which is a very narrowly defined good as compared to cereal generally, 
Title: Substitute good
Content:  few, if any substitutes. To illustrate this further, we can imagine that while both Rice Krispies and Froot Loops are types of cereal, they are imperfect substitutes, as the two are very different types of cereal. However, generic brands of Rice Krispies, such as Malt-o-Meal's Crispy Rice would be a perfect substitute for Kellogg's Rice Krispies. Imperfect substitutes have a low cross-elasticity of demand. If two brands of cereal have the same prices before one's price is raised, we can expect sales to fall for that brand. However, sales will not raise by the same amount for the other brand, as there are many types of cereal that are equally substitutable for the brand which has raised its price; consumer preferences determine which brands pick up their losses.
Title: Ersatz good
Content:  Ersatz is a German word literally meaning substitute or replacement. Although it is used as an adjective in English, it is a noun in German. In German orthography noun phrases formed are usually represented as a single word, forming compound nouns such as Ersatzteile ("spare parts") or Ersatzspieler ("substitute player"). While ersatz in English generally means that the substitution is of unsatisfactory or inferior quality compared with the "real thing", in German, there is no such implication: e.g., Ersatzteile 'spare parts' is a technical expression without any implication about quality, whereas Kaffeeersatz 'coffee substitute' is not made from coffee beans, and is thus inferior. The term for inferior substitute in German would be Surrogat, which is cognate to English word "surrogate".
Title: Substitute good
Content:  Perfect substitutes refer to a pair of goods with uses identical to one another. In that case, the utility of a combination of the two goods is an increasing function of the sum of the quantity of each good. That is, the more the consumer can consume (in total quantity), the higher level of utility will be achieved, see figure 3. Perfect substitutes have a linear utility function and a constant marginal rate of substitution, see figure 3. If goods X and Y are perfect substitutes, any different consumption bundle will result in the consumer obtaining the same utility level for all the points on the indifference curve (utility function). Let a consumption bundle be represented by (X,Y), then, a consumer of perfect substitutes would receive the same level of utility from (20,10) or (30,0). Consumers 
Title: Substitute good
Content:  Within-category substitutes are goods that are members of the same taxonomic category such as goods sharing common attributes (e.g., chocolate, chairs, station wagons). Cross-category substitutes are goods that are members of different taxonomic categories but can satisfy the same goal. A person who wants chocolate but cannot acquire it, for example, might instead buy ice cream to satisfy the goal of having a dessert. Whether goods are cross-category or within-category substitutes influences the utility derived by consumers. People exhibit a strong preference for within-category substitutes over cross-category substitutes, despite cross-category substitutes being more effective at satisfying customers' needs. Across ten sets of different 
Title: Natural resource economics
Content:  substitute are (1) ready availability domestically in adequate quantities or availability from contiguous nations, or possibly from overseas allies, (2) possessing physical and chemical properties, performance, and longevity comparable to the material of first choice, (3) well-established and known behavior and properties particularly as a component in exotic alloys, and (4) an ability for processing and fabrication with minimal changes in existing technology, capital plant, and processing and fabricating facilities. Some suggested substitutions were alunite for bauxite to make alumina, molybdenum and/or nickel for cobalt, and aluminum alloy automobile radiators for copper alloy automobile radiators. Materials can be eliminated without 
Title: Substitute good
Content:  79.7% of research participants believed that a within-category substitute would better satisfy their craving for a food they could not have than a cross-category substitute. Unable to acquire a desired Godiva chocolate, for instance, a majority reported that they would prefer to eat a store-brand chocolate (a within-category substitute) than a chocolate-chip granola bar (a cross-category substitute). This preference for within-category substitutes appears, however, to be misguided. Because within-category substitutes are more similar to the missing good, their inferiority to it is more noticeable. This creates a negative contrast effect, and leads within-category substitutes to be less satisfying substitutes than cross-category substitutes.

Question: a good that can be used in place of another good?
Answer: A substitute good.
substitute good.