Economic works
Hubbard was a supporter of the Corn Laws of early 19th-century Britain. He advocated in 1842 for a moderate, fixed duty on corn imports. He published in the 1840s:
Vindication of a Fixed Duty on Corn: To which are Added Remarks Suggested by the Speech of R.A. Christopher, Esq. M.P. at Lincoln (1842). The subtitle refers to Robert Nisbet-Hamilton, at the time of publication known as Robert Christopher.
The Currency and the Country (1843). This work was quoted in Das Kapital, Volume III.
A Letter to the Right Honourable Sir Charles Wood, Bart., M.P., Chancellor of the Exchequer, on the Monetary Pressure and Commercial Distress of 1847 (1848), on the panic of 1847.
Convinced capital and income should be treated differently, Hubbard lobbied in parliament for the fiscal treatment of income tax on earned income only. The topic was under active discussion for a decade from 1852, with contributions also from William Farr, J. R. McCulloch and William Lucas Sargant.
How Should an Income Tax be Levied?: Considered in a Letter to the Right Honourable Benjamin Disraeli, M.P., Chancellor of the Exchequer (1852)
Reform or Reject the Income-tax: Objections to a Reform of the Income-tax Considered in Two Letters to the Editor of the Times : with Additional Notes (1853)
Gladstone on the Income Tax: Discussion on the Income Tax, in the House of Commons on 25th April, 1884 : with Preface and Historical Sketch, Including a Proposed Bill (1885)
