Workers' control can be contrasted to control of the economy via the state such as nationalisation and central planning (see state socialism) and private control of the means of production as found in capitalism. A worker cooperative is a cooperative owned and democratically managed by its worker-owners. This control may be exercised in a number of ways. A cooperative enterprise may mean a firm where every worker-owner participates in decision making in a democratic fashion, or it may refer to one in which managers and administration is elected by every worker-owner and finally it can refer to a situation in which managers are considered and treated as, workers of the firm. In traditional forms of worker cooperative, all shares are held by the workforce with no outside or consumer owners and each member has one voting share. In practice, control by worker owners may be exercised through individual, collective or majority ownership by the workforce, or the retention of individual, collective or majority voting rights (exercised on a one-member one-vote basis). A worker cooperative therefore has the characteristic that the majority of its workforce own shares, and the majority of shares are owned by the workforce. Nevertheless, anarcho-communism has been critical of workers ownership of large means of production for the following reasons: "Whereas the syndicalist alternative re-privatizes the economy into "self-managed" collectives and opens the way to their degeneration into traditional forms of private property – whether "collectively" owned or not – libertarian municipalism politicizes the economy and dissolves it into the civic domain. Neither factory or land appear as separate interests within the communal collective. Nor can workers, farmers, technicians, engineers, professionals, and the like perpetuate their vocational identities as separate interests that exist apart from the citizen body in face-to-face assemblies. "Property" is integrated into the commune as a material constituent of its libertarian institutional framework, indeed as a part of a larger whole that is controlled by the citizen body in assembly as citizens – not as vocationally oriented interest groups". Forms of exchange Anarchist economist Kevin Carson manifests that "[l]ocal currencies, barter networks and mutual credit‐clearing systems are a solution to a basic problem: a world in which there is a lot of work to be done, but there is simply no money around to bring the people and the work together". Alternate currency An alternative currency is any currency used as an alternative to