Growth Response to Competitive Shocks: Market Structure Dynamics Under Liberalisation - the Case of India

Liberalisation transforms market structures through the behavioural responses of incumbent firms and entrants, large firms and small, to enhanced freedom of choice. Change in market share volatility, and change in the effective agility of small and large firms underpin changes in market structure. We analyse these processes for Indian manufacturing industries over the 18-year period from 1980, spanning the domestic liberalisation of 1985 and the more comprehensive reforms of 1991, using a data set of large and medium firms in 83 industries. We find that while market structures themselves appeared to change little, turbulence in market shares, as well as the way growth is related to size responded markedly, differing in direction and magnitude, depending on whether the liberalisation was partial and domestic, or comprehensive. We find that they tended to offset each other, leading to little visible change in market structure itself. We also find that while drivers of market structure traditionally recognised in industrial organisation studies had significant impacts on both components of concentration change, their dynamics are captured very well by a parsimonious model that has just the announcement effects - the reform dates.Liberalisation, Competitive Shocks, Firm growth, Turbulence, Market structure, India

Undergraduate teaching in COVID-19 pandemic: an experience at tertiary care centre

Background: COVID-19 outbreak has taught us to opt for technologies, which have not been used before. There is lot of information available on the internet for learning, but undergraduate students of medicine need continuous guidance. The best platform would be live online teaching which includes student centred learning and observing appropriate COVID-19 social distancing. Aims and objectives of the study was to highlight various positive and negative impacts of COVID-19 on medical education.Methods: The students included in the study are from second MBBS with total number of 200. Time table was planned and everyday two live lectures across their subjects of study were taken. The classes were carried out using the Cisco Webex software. The students were able to ask questions and cleared doubts during and at the end of each class. The feedback of the session was collected by structured format and observations recorded.Results: In the present study the advantages of online classes based on student observations were: learning at ease, flexible environment, no delay in classes, and no peer distraction. In the present study the disadvantages were: eyes are getting strained, network issues, concentrate for long time, disturbances at home and no practical knowledge. In the present study, improvements and suggestions offered were to provide recorded videos or power point presentation, case based discussions, assignments and revision classes to be increased.Conclusions: The present study had several limitations. The study was conducted during the first phase of the COVID-19 pandemic at a Government Institute where most students belong to middle class. Despite these limitations, we believe the study provides relevant insights into the challenges facing online medical education in a time of healthcare crisis

Study of fetomaternal outcome in various modes of breech delivery in a tertiary care hospital- MGM GH, Trichy

Background: Aim of the study was to optimize the fetomaternal outcome using different modes of delivery in breech presentation and objective of the study was to optimize the maternal and perinatal outcome in various modes of breech delivery.Methods: Among 150 mothers with different parity and gestational age having singleton breech were studied during May 2019- October 2019 for the period of 6 months at KAPV government medical college. Fetomaternal outcome was compared in various modes of breech delivery during this study period in our institute. This study was a prospective analytical study.Results: Incidence of breech presentation was 3.3% of total deliveries in this institute. Around 4 (26.6%) cases by emergency LSCS, 48 (32%) cases delivered vaginally, 62 (41.3%) cases by elective LSCS. Comparatively, large number of cases were delivered by planned caesarean section in our institute. The maternal and perinatal morbidity and mortality was found to be less in planned caesarean section compared with other modes of delivery in this study.Conclusions: In view of insignificant difference in the fetomaternal outcome balanced decision about mode of delivery on a case by case basis will go a long way in improving both fetal and maternal outcome. Regular drills and conduct of assisted vaginal breech delivery should be pursued in all maternity hospitals

Using Functional Near Infrared Spectroscopy (fNIRS) to study dynamic stereoscopic depth perception

The parietal cortex has been widely implicated in the processing of depth perception by many neuroimaging studies, yet functional near infrared spectroscopy (fNIRS) has been an under-utilised tool to examine the relationship of oxy- ([HbO]) and de-oxyhaemoglobin ([HbR]) in perception. Here we examine the haemodynamic response (HDR) to the processing of induced depth stimulation using dynamic random-dot-stereograms (RDS). We used fNIRS to measure the HDR associated with depth perception in healthy young adults (n = 13, mean age 24). Using a blocked design, absolute values of [HbO] and [HbR] were recorded across parieto-occipital and occipital cortices, in response to dynamic RDS. Control and test images were identical except for the horizontal shift in pixels in the RDS that resulted in binocular disparity and induced the percept of a 3D sine wave that 'popped out' of the test stimulus. The control stimulus had zero disparity and induced a 'flat' percept. All participants had stereoacuity within normal clinical limits and successfully perceived the depth in the dynamic RDS. Results showed a significant effect of this complex visual stimulation in the right parieto-occipital cortex (p < 0.01, η(2) = 0.54). The test stimulus elicited a significant increase in [HbO] during depth perception compared to the control image (p < 0.001, 99.99 % CI [0.008-0.294]). The similarity between the two stimuli may have resulted in the HDR of the occipital cortex showing no significant increase or decrease of cerebral oxygenation levels during depth stimulation. Cerebral oxygenation measures of [HbO] confirmed the strong association of the right parieto-occipital cortex with processing depth perception. Our study demonstrates the validity of fNIRS to investigate [HbO] and [HbR] during high-level visual processing of complex stimuli