A summary of Test cricket by period (Part 1)
This is a major attempt to generate a set of measures for Test Cricket by period

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Readers should also realize that after I thought of this complex topic, I have put in nearly a month's work, on and off. into preparing this complicated analysis. I would appreciate avoiding of a superficial read and flippant off-the-cuff comments.
The analysis covers various aspects of Test Cricket. Since the article has become too long, it has been split into two parts. The first part covers Matches, Innings, Results, Partnerships and Extras. The second part covers Batting, Bowling, Keeping and Dismissals.
1. 1877 - 1914 (Pre World war 1) 2. 1920 - 1939 (In between the two World Wars) 3. 1946 - 1959 (1940s & 1950s) 4. 1960 - 1969 (1960s) 5. 1970 - 1979 (1970s) 6. 1980 - 1989 (1980s) 7. 1990 - 1999 (1990s) 8. 2000 - 2008 (2000s)These are logical and reasonably evenly spaced periods. Anything more will result in too many periods with consequent difficulty in following the tables and anything less will telescope multiple differing periods into one and we will lose out in analysis.
Even the formatting of the article required a lot of thinking. I tried having the periods horizontally. It was difficult to read. There was also the need to present the core data such as runs, wickets, balls, wickets et al to the readers. So I adopted a dual presentation approach. In the main body of the article I show the calculated measures in a grouped form and the base core data in the supporting pages. That way all the information is shown and the main report is not cluttered. I have also avoided showing the variance of each period figure to the all-Test averages to avoid showing too many numbers. That will indeed be the key figure to make adjustments.
Let us get into the analysis results.
First the base Match analysis.
1. Match analysis 1 (Balls/Runs/Wkts per match)
Period Mats B/M R/M W/M
Surprisingly the Balls per match figure during the first period has been quite high despite the number of 3-day tests. This, despite 4-ball overs during most of these years requiring more change over time. During 1960s the balls per match is the highest. More than the match days, I feel this is certainly a result of lot more drawn matches during this period and to a lesser extent the 1970s.
The runs per match is the highest during the current decade and the lowest during the first period when batting was indeed difficult. The relatively high 1960s and 1970s figure must no doubt be due to the number of drawn matches.
More Wickets per match fell during the first period. Barring this period the figure has remained fairly static.
To view the complete table please click here.
2. Match analysis 2 (Runs/Wkt, Runs/Over)
Period RpO RpW
There have been 4/5/8 ball overs at different times in Test cricket, however all RpO figures have been standardized to 6 bpo for this table.
Barring the first period the Runs per wicket figure has remained fairly stable. The figure is highest during current decades. For most of the periods the RpW figure has exceeded 30.
To view the complete table please click here.
3. Inns Analysis (Runs per completed inns, Low and high scores)
Period R/CI I<100 I>500
During the first period, there was an extraordinarily high instances of sub-100 innings. Over 12.5% of the innings completed (53 out of 494) were below 100. The second period was a major drop in the sub-100 innings. However the figure almost doubled during the 40s-50s. Then it has settled down. The 1990s had the lowest figure. Surprisingly the current decade's is double that of the previous decade. There have been 36 such instances out of 1052 completed innings.
I was so intrigued by this sudden escalation that I decided to make a detailed study. As expected the culprits were Bangladesh with 8 sub-100 scores and Zimbabwe with 7. However the situation has been worsened by the West Indian decline. They have had 5 sub-100 scores. At the other end, Australia and South Africa have had one instance each.
Predictably there were very few 500+ innings during the first period. Then the % stabilized to the all-Test average during the next 6 periods. There has been a noticeable increase during the current decade with 147 of the 1489 innings crossing 500. Remember that these are not just completed innings but all innings.
Australia leads with 28 500+ scores while India is close with 24. At the other end Zimbabwe has only 2 scores in excess of 500 while Bangladesh has not crossed 500.
The paradoxical current decade situation of high number of 500+ scores and high number of sub-100 scores is a pointer to the wide gap between teams as well as the drive to achieve results.
To view the complete table please click here.
4. Partnerships analysis (Opening & Last 3 wkts)
Period Open OP100+ OPSub10 Last3W
Even though I am not a fan of measuring quality through individual 100s (I always treat the 100th run as nothing more than the run(s) scored around the 99 mark), a 100 partnership is more significant since it delivers a psychological blow for the team. A fairly low number of partnerships during the first period crossed 100. Surprisingly this was followed by a doubling during the next period with over 10% of the partnerships crossing 100 (56 out of 494). There has been a recent increase during the current decade, also at a good scoring rate.
The next is a measure of opening failures. These are the sub-10 (single digit) partnerships. This includes only instances where the first wicket has fallen. During the early days, especially during the first period, well over a third of the partnerships have been failures. This figure improved over the years but has picked up now and we are back to a fairly high (either side of) 30% figure. It may have to do with the attacking attitude of the opening batsmen nowadays. I could have done a "opener dismissed at 0" analysis. However I feel that a single digit partnership is a failure and a 0 is no worse than a 5 or 9.
The next measure is the number of runs added for the last 3 wickets. This has not varied much barring the 40s-50s when it fell to around 40. For the current decade the value is around 50, indicating a more committed late order batting set-up with better techniques and application.
To view the complete table please click here.
5. Extras Analysis - per 1000 balls (Extras/Byes/LegByes/NoBalls/Wides)
Period E/Tb B/Tb L/Tb N/Tb W/Tb
The number of Extras per Tb has increased over the years and the current decade figure is the highest, about 20% higher than the all-Tests average.
The Byes per Tb started at a high figure and now stands around the all-Test average. Have the keepers become that much better?
Leg Byes follows the reverse pattern. Starting at a low level it is now at a fairly high level.
No Balls per Tb have increased significantly. They were extremely low during the first 70 years and suddenly zoomed up during the 1970s and have remained there. Possibly the changing of the No ball rule during the 1960s must have contributed to this increase.
Wides per Tb have also increased during the current decade, almost double of the all-Test average and the previous period of value. Possibly the bowlers are striving for too much. May also be that the unmpires, no doubt influenced by the ODI experience, are calling wides more often now.
The increase in LB/Nb/Wides per Tb has more than odffset the drop in Byes per Tb and this has resulted in the overall increase in Extras per Tb.
To view the complete table please click here.
6. Results Analysis (Results/HomeWins/AwayWins)
Period Res% HW % AW % Dr %
A similar pattern emerges in the Home wins measure. The first and last periods have high Home wins % values.
The best period for Away wins was the first one when the 3 month sea travel seemed to have done something good since 38% of the matches finished with Away wins. This value has since dropped and stood at its lowest during the 1960s when "Not to lose" was the motto. The value has picked up significantly during the current decade with over 30% Away wins.
The Draws % shows low values during the first and last periods. The most boring period in Test history was during 1960s when nearly half of the matches ended in draws, not all of them the exciting ones.
To view the complete table please click here.
The second part of the article will follow in a week's time covering the Batting, Bowling, Keeping and Dismissals aspects. I will also try and do some changes based on any significant comments. I invite readers' comments, both on these areas and the ones being analyzed next week. At the end of the second part, if readers so desire, I will also make available an XL sheet containing all the measures analysed, including % variances to the all-Test averages.
Anantha Narayanan has written for ESPNcricinfo and CastrolCricket and worked with a number of companies on their cricket performance ratings-related systems