"economically linked" is a correct and usable phrase in written English.
You can use it when discussing two or more countries, organizations, individuals, or other entities that are connected through economics. For example, "The European Union is economically linked with its member nations, which share a common currency and cooperate on business and trade regulations."
It is a planned economic entity consisting of three economically linked components: production (including specialization industries and auxiliary activities), infrastructure, and local resources (including manpower), which have to be harmonized in a particular geographical area.
These small islands have become dangerous friction points between Asia's most economically linked countries, with all sides calling their claims irrefutable and just, and brushing aside the idea of compromise.
Nowadays they both insist, of course, that they are economically linked to Asia and the Far East.
Confederate sympathizers won only the Jackson Purchase region, which was economically linked to Tennessee by the Cumberland and Tennessee Rivers.
Migration dynamics that keep households economically vital are conceptually flattened through the temporary migrants being grouped into the urban category while their households of origin, to which they remain economically linked, are classified as rural.
Fax referral programs quickly and economically can link smokers' visiting primary care clinics to state-based telephone quitlines.
In the event, England was linked, economically and culturally, to France and continental Europe.
Interspersed among those natural areas are suburban areas linked economically with neighbouring London.
Over the past decade, the world became as tightly linked, economically, as it had ever been.
In the late 19th century, prosperous Barcelona was economically and culturally linked to the rest of Europe, especially Paris.
Linked economically with Switzerland, its smaller neighbour the Principality of Liechtenstein uses Swiss currency and enjoys the protection of the Swiss army.
