Louisiana Revised Statute 23:1021(12) defines "average weekly wage" in this way:

 "Wages" means average weekly wage at the time of the accident.  The average weekly wage shall be determined as follows:

(a)  Hourly wages.

(i)  If the employee is paid on an hourly basis and the employee is employed for forty hours or more, his hourly wage rate multiplied by the average actual hours worked in the four full weeks preceding the date of the accident or forty hours, whichever is greater; or

(ii)  If the employee is paid on an hourly basis and the employee was offered employment for forty hours or more but regularly, and at his own discretion, works less than forty hours per week for whatever reason, then, the average of his total earnings per week for the four full weeks preceding the date of the accident; or

(iii)  If the employee is paid on an hourly basis and the employee is a part-time employee, his hourly wage rate multiplied by the average actual hours worked in the four full weeks preceding the date of the injury.

(iv)  A part-time employee, as defined in R.S. 23:1021(9) and who is employed by two or more different employers in two or more successive employments, shall be entitled to receive benefits as follows:

(aa)  If an employee is employed by two or more different employers in two or more successive employments and the employee incurs a compensable injury under the provisions of this Chapter in one of the employments, the employer in whose service the employee was injured shall pay the benefits due the employee as provided in this Chapter.

(bb)  If the employee is a part-time employee in one of the successive employments, is injured in that employment, but as a result of the injury also incurs loss of income from other successive employments, that employee shall be entitled to benefits computed by determining wages under the provisions of this Subsection using his hourly rate in employment at the time of injury and using the total hours worked for all employers of the part-time employee, but not to exceed his average, actual weekly hours worked or forty hours weekly, whichever is less.

(v)  For an employee in seasonal employment, his annual income divided by fifty-two.

(aa)  For purposes of this Subparagraph, seasonal employment shall be any employment customarily operating only during regularly recurring periods of less than forty-four weeks annually.

(bb)  If the employee was not engaged in the seasonal employment more than one year prior to the accident, his annual income shall be the average annual income of other employees of the same or most similar class working in the same or most similar employment for the same employer or, in the event that the employee was the only individual engaged in that specific employment, then his annual income shall be the average annual income of other employees of the same or most similar class working for a neighboring employer engaged in the same or similar employment.

(b)  Monthly wages.  If the employee is paid on a monthly basis, his monthly salary multiplied by twelve then divided by fifty-two.

(c)  Annual wages.  If the employee is employed at an annual salary, his annual salary divided by fifty-two.

(d)  Other wages.  If the employee is employed on a unit, piecework, commission, or other basis, his gross earnings from the employer for the twenty-six week period immediately preceding the accident divided by the number of days the employee actually worked for the employer during said twenty-six week period and multiplied by the average number of days worked per week; however, if such an employee has worked for the employer for less than a twenty-six week period immediately preceding the accident, his gross earnings from the employer for the period immediately preceding the accident divided by the number of days the employee actually worked for the employer during said period and multiplied by the average number of days worked per week.

(e)  Exceptions.  For municipal police officers, additional compensation paid by the state pursuant to R.S. 33:2218.4 shall not be included in the calculation and computation of total salary or average weekly wage to the extent such officer continues to receive such additional compensation during the period of his disability.

(f)  Income tax.  In the determination of "wages" and the average weekly wage at the time of the accident, no amount shall be included for any benefit or form of compensation which is not taxable to an employee for federal income tax purposes; however, any amount withheld by the employer to fund any nontaxable or tax-deferred benefit provided by the employer and which was elected by the employee in lieu of taxable earnings shall be included in the calculation of the employee's wage and average weekly wage including but not limited to any amount withheld by the employer to fund any health insurance benefit provided by the employer and which was elected by the employee in lieu of taxable earnings shall be included in the calculation of the employee's wage and average weekly wage.

(g)  Date of accident.  In occupational disease claims the date of the accident for purposes of determining the employee's average weekly wage shall be the date of the employee's last employment with the employer from whom benefits are claimed or the date of his last injurious exposure to conditions in his employment, whichever date occurs later.

More: Louisiana Workers' Compensation Wage Benefits