The extent to which a jurisdiction is regarded as offshore is often a question of perception and degree. Classic tax haven countries such as Bermuda, British Virgin Islands and the Cayman Islands are quintessentially offshore jurisdictions, and companies incorporated in those jurisdictions are invariably labelled as offshore companies. Thereafter there are certain small intermediate countries or areas such as Hong Kong and Singapore (sometimes referred to as "mid-shore" jurisdictions) which, whilst having oversized financial centres, are not zero tax regimes. Finally, there are classes of industrialised economies which can be used as part of tax mitigation structures, including countries like Ireland, the Netherlands and particularly the United Kingdom, in commentary relating to corporate inversion and the use of British Overseas Territories for this purpose. Furthermore, in Federal systems, states which operate like a classic offshore centre can result in corporations formed there being labelled as offshore, even if they form part of the largest economy in the world (for example, Delaware in the United States).