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An insider is a member of any group of people of limited number and generally restricted access. The term is used in the context of secret, privileged, hidden or otherwise esoteric information or knowledge: an insider is a "member of the gang" hence knows things outsiders don't, including insider jargon. In our complicated and information-rich world, the concept of insider knowledge is popular and pervasive, as a source of direct and useful guidance. In a given situation, an insider is contrasted with an outside expert: the expert can provide an in-depth theoretical analysis that should lead to a practical opinion, while an insider has firsthand, material knowledge. Insider information may be thought of as more accurate and valuable than expert opinion. == Roles == There are many popular cultural roles ascribed to the insider. In criminal and social justice, whistle-blowing and leaks are seen as (often heroic) efforts of individual insiders to right wrongs by making secret information public, usually in David and Goliath situations (e.g. by revealing transgressions of governments, large corporations or other powerful organizations). When whistle-blowers are cultivated by outside forces, they are known as informants and informers. In finance, insider trading on the stock market is widely thought of as a means of rapidly increasing wealth for the privileged few who have access to private business information. This is at times perceived as profiting unfairly at the expense of others. Some forms of insider trading are illegal. In everyday life, insider knowledge is seen as a source of practical information that is contrary to the standard or official advice, delivered in the form of tips from insiders in a wide range of industries. Industry insiders tell outsiders what really goes on behind the scenes, so that they can take advantage of that knowledge. Related to this is personal insider access, where advantageous info can be gained through "knowing someone" ("I'll find out what really goes on from my brother the cop, or my aunt the judge, or my friend who works in accounting"). In business, tips take the form of insider knowledge used by individuals and companies, often away from the view of the public. Jobs and contracts, while openly advertised, in fact go to people based on exchanges of various inside info between key parties. Here, the insider channels can themselves be revealed to a wider audience by other insiders. A variation of this is the insider-versus-expert authority conflict, where the uncredentaled, "non-expert" insider has a better functional knowledge of a situation, based on "how things really work", than the outside experts, whose expertise is often embodied in a set of rules. For example, there is the farmer who sees folly in new agricultural regulations created by a team of government experts without firsthand farming experience. Or the office staff that keeps a business running smoothly by unofficially ignoring and working around impractical rules devised by management consultants. In the media, investigative reports, exposés and inside stories are popular genres that usually rely on insiders speaking out, with results ranging from the trivial to the monumentally whistle-blowing. And in information technology, an "insider" may refer to a member of a beta testing program who downloads, tests, and provides feedback on pre-release software. The developer of the software could then take this feedback into account as part of the software development process. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Insider」の詳細全文を読む スポンサード リンク
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