NLRB Stats Archive › Annual Reports › FY1940 › Man-days of idleness due to strikes and index of industrial production, by months, January 1935–June 1940

Man-days of idleness due to strikes and index of industrial production, by months, January 1935–June 1940

source page 169 · nlrb1940_p0169_t0

Month	1935		1936		1937		1938		1939		1940
Month	Man-days of idleness	Industrial production index	Man-days of idleness	Industrial production index	Man-days of idleness	Industrial production index	Man-days of idleness	Industrial production index	Man-days of idleness	Industrial production index	Man-days of idleness	Industrial production index
	Thous.		Thous.		Thous.		Thous.		Thous.		Thous.
January	721	80	636	91	2,720	112	473	82	513	98	239	117
February	836	85	748	91	1,491	115	514	82	553	99	282	113
March	967	86	1,331	94	3,289	120	768	84	618	100	373	112
April	1,179	84	700	100	3,377	122	838	82	4,902	98	426	111
May	1,698	84	1,019	103	2,983	125	1,174	81	3,548	99	651	116
June	1,311	85	1,328	103	4,998	120	871	81	958	102	400	121
July	1,298	84	1,105	103	3,008	118	776	85	1,168	102
August	1,192	87	911	106	2,270	120	831	90	1,101	103
September	3,027	90	1,063	108	1,450	115	990	95	892	116
October	1,563	94	1,054	111	1,182	110	842	99	1,508	126
November	1,004	95	1,941	114	982	97	558	102	1,665	126
December	661	94	2,066	114	674	86	513	100	384	124

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1 Includes estimated 4,226,000 man-days of idleness due to bituminous coal stoppage. It has been pointed out that this dispute "concerned no principle involved in the Wagner Act" (New York Times editorial, May 6, 1939). Were figure adjusted to exclude bituminous coal stoppage it would be 676,000.
2 Includes estimated 2,694,000 man-days of idleness due to bituminous coal stoppage. Were figure adjusted to exclude bituminous coal stoppage it would be 854,000.
3 Preliminary estimate.
SOURCES: Strike data, 1935-39: U. S. Bureau of Labor Statistics, Monthly Labor Review, May 1937, 1939, and 1940. 1940: U. S. Bureau of Labor Statistics, Division of Industrial Relations (preliminary data). Industrial production indexes (revised series): Board of Governors, Federal Reserve System, Federal Reserve Bulletin.

0 of 66 figures sit in a row or column sum that works out.

Reader’s notes

p. 169. 13 columns: stub "Month" plus a pair of columns (man-days of idleness; industrial production index) for each year 1935 through 1940. The first body row carries no label; it holds the italic unit word "Thous." printed once in each of the six man-days columns, just below the header rule. I transcribed it as a body row rather than a heading level because it sits below the rule; the index columns have no unit word. Footnote markers 1, 2 and 3 are printed as small raised digits to the LEFT of the values they attach to (April 1939 = 4,902, May 1939 = 3,548, June 1940 = 400); per instructions they are written after the value behind a caret. The marker on the June 1940 value is faint but is consistent with footnote 3 ("Preliminary estimate"), which fits the 1940 preliminary data described in the SOURCES line. Doubtful cells: February 1936 man-days reads "748" followed by a small stray apostrophe-like speck; I read it as 748 with no marker, since no footnote matches. December 1936 man-days is read as 2,066; the last two digits are thickened by the scan and 2,068 cannot be fully excluded. July through December in the 1940 pair of columns are printed as dash rules (------), transcribed as empty cells. The caption also bears a small raised marker after "June 1940"; the caption is excluded from this transcription.

Source image

Source page 169 of NLRB FY1940 annual report — Source: NLRB Annual Report FY1940, p. 169.

Source data: U.S. NLRB Annual Reports (public domain). Reconstruction by NLRB Stats Archive. Read by claude-opus-5 (effort max, prompt extract_v1) from the 300-dpi scan; stitched by page. Updated October 2026.