  information good in economics and law is a type commodity whose main market value is derived from the information it contains. typical examples of information goods include a cd containing pieces of music, a dvd containing a movie, a computer file which is a piece of program, a book containing short stories, and so on. in information goods, the valuable part is a pattern in which the material is arranged - the arrangement of ink on paper, paint on canvas, magnetic elements on a tape, a series of dents (pits) on a compact disc, etc. those patterns might be either directly consumed by humans (through reading, viewing, etc.) or may be used to operate other devices such as a cassette player or a computer. the working of device, in turn, may produce some consumable pattern of information (such as visual, sound, or text), another pattern for the use of other devices, or both. information goods are often contrasted with material goods such as clothes, food, and cars. the market values of these goods typically rely on both the nature of material and its arrangements. when a car is made of wood instead of metals, for example, the market value of the car would be very limited. ==information goods and market failure== ===information goods and uncertainty=== a consumer may not be able to assess accurately and reliably the utility of some information goods, such as novels, movies, and newspapers, before consumption of the goods. this is a peculiar property of information goods whereby the process of evaluating utility may require the very process of consumption. this uncertainty is a type of market failure known as the lemon problem and is not unique to information goods. advertisements, brands, third-party reviews and other secondary sources of information play a bigger role in determining the demand curve by attempting to increase or change information about the good before sale. ===information goods and scarcity===  some information goods can be reproduced and distributed relatively inexpensively. copying recorded music from radio, cassette player, cd player, etc. to a tape or computer hard disc is, for example, widely-practiced in many societies. what is more, information goods are not consumed by the act of copying. on this basis, some argue that information (but not necessarily information goods) should be provided without cost and limitations to copying. ===information goods and excludability=== as digital technologies and digital electronic network in some countries became very popular, it was very easy to reproduce and widely distribute some information goods. however, due to the difficulty of control on copying and distributing activities of individuals using such technologies, it is often harder for the producer of such goods to prevent illegal distribution of pro
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