“…Most prominently, several oil-a nd gas-producing states allocate severance tax revenues to what are known as trust-or permanent-funds, following on the pioneering effort in Texas from the early twentieth century. These funds are traditionally protected by state constitutions and thus are designed to feature greater longevity than other state funds created only through statute (Rabe and Hampton 2016). States that use trusts funds include Texas, New Mexico, Wyoming, Montana, Alaska, and most recently, North Dakota, Utah, and West Virginia.…”